EP3421453A1 - Carbazole derivatives and their use in optoelectronic devices - Google Patents
Carbazole derivatives and their use in optoelectronic devices Download PDFInfo
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- EP3421453A1 EP3421453A1 EP18179499.1A EP18179499A EP3421453A1 EP 3421453 A1 EP3421453 A1 EP 3421453A1 EP 18179499 A EP18179499 A EP 18179499A EP 3421453 A1 EP3421453 A1 EP 3421453A1
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- 230000005693 optoelectronics Effects 0.000 title claims abstract description 18
- 125000000609 carbazolyl group Chemical class C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 title description 4
- 125000001424 substituent group Chemical group 0.000 claims abstract description 107
- 239000000126 substance Substances 0.000 claims abstract description 56
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 29
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 25
- 239000001257 hydrogen Substances 0.000 claims abstract description 24
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 107
- -1 2-substituted 2-chloro-3-(trifluoromethyl)benzonitrile Chemical class 0.000 claims description 82
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 75
- 229910052717 sulfur Inorganic materials 0.000 claims description 74
- 229910052760 oxygen Inorganic materials 0.000 claims description 73
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 32
- 229910052805 deuterium Inorganic materials 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 23
- 150000002431 hydrogen Chemical group 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 239000002904 solvent Substances 0.000 claims description 15
- 125000003118 aryl group Chemical group 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 229910052731 fluorine Inorganic materials 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- 125000006749 (C6-C60) aryl group Chemical group 0.000 claims description 7
- 229910052794 bromium Inorganic materials 0.000 claims description 7
- 229910052740 iodine Inorganic materials 0.000 claims description 7
- XSXHWVKGUXMUQE-UHFFFAOYSA-N osmium dioxide Inorganic materials O=[Os]=O XSXHWVKGUXMUQE-UHFFFAOYSA-N 0.000 claims description 7
- 125000006527 (C1-C5) alkyl group Chemical group 0.000 claims description 5
- 230000005669 field effect Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 4
- 125000004648 C2-C8 alkenyl group Chemical group 0.000 claims description 3
- 125000004649 C2-C8 alkynyl group Chemical group 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 239000000975 dye Substances 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 125000003367 polycyclic group Chemical group 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000000376 reactant Substances 0.000 claims description 3
- 125000006729 (C2-C5) alkenyl group Chemical group 0.000 claims description 2
- 125000006730 (C2-C5) alkynyl group Chemical group 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 125000002950 monocyclic group Chemical group 0.000 claims description 2
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 238000001771 vacuum deposition Methods 0.000 claims description 2
- 125000004093 cyano group Chemical group *C#N 0.000 claims 2
- 150000002894 organic compounds Chemical class 0.000 claims 1
- 239000010410 layer Substances 0.000 description 112
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 46
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 44
- 238000004770 highest occupied molecular orbital Methods 0.000 description 29
- 150000001875 compounds Chemical class 0.000 description 27
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 27
- 238000000295 emission spectrum Methods 0.000 description 18
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 15
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- 230000015572 biosynthetic process Effects 0.000 description 14
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 0 *c1cccc(c2c3cccc2)c1[n]3-c1cc(-c2c(C(F)(F)F)cccc2C#N)cc(-[n]2c3c(*)cccc3c3c2cccc3)c1C#N Chemical compound *c1cccc(c2c3cccc2)c1[n]3-c1cc(-c2c(C(F)(F)F)cccc2C#N)cc(-[n]2c3c(*)cccc3c3c2cccc3)c1C#N 0.000 description 11
- 230000005525 hole transport Effects 0.000 description 11
- 238000006862 quantum yield reaction Methods 0.000 description 11
- 238000005259 measurement Methods 0.000 description 10
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- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- 125000004306 triazinyl group Chemical group 0.000 description 9
- 125000001072 heteroaryl group Chemical group 0.000 description 8
- MMNNWKCYXNXWBG-UHFFFAOYSA-N 2,4,6-tris(3-phenylphenyl)-1,3,5-triazine Chemical compound C1=CC=CC=C1C1=CC=CC(C=2N=C(N=C(N=2)C=2C=C(C=CC=2)C=2C=CC=CC=2)C=2C=C(C=CC=2)C=2C=CC=CC=2)=C1 MMNNWKCYXNXWBG-UHFFFAOYSA-N 0.000 description 7
- 238000005424 photoluminescence Methods 0.000 description 7
- XESMNQMWRSEIET-UHFFFAOYSA-N 2,9-dinaphthalen-2-yl-4,7-diphenyl-1,10-phenanthroline Chemical compound C1=CC=CC=C1C1=CC(C=2C=C3C=CC=CC3=CC=2)=NC2=C1C=CC1=C(C=3C=CC=CC=3)C=C(C=3C=C4C=CC=CC4=CC=3)N=C21 XESMNQMWRSEIET-UHFFFAOYSA-N 0.000 description 6
- YEWVLWWLYHXZLZ-UHFFFAOYSA-N 9-(3-dibenzofuran-2-ylphenyl)carbazole Chemical compound C1=CC=C2C3=CC(C=4C=CC=C(C=4)N4C5=CC=CC=C5C5=CC=CC=C54)=CC=C3OC2=C1 YEWVLWWLYHXZLZ-UHFFFAOYSA-N 0.000 description 6
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 6
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 6
- 238000000589 high-performance liquid chromatography-mass spectrometry Methods 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 125000004076 pyridyl group Chemical group 0.000 description 6
- 125000000714 pyrimidinyl group Chemical group 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- AWXGSYPUMWKTBR-UHFFFAOYSA-N 4-carbazol-9-yl-n,n-bis(4-carbazol-9-ylphenyl)aniline Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(N(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 AWXGSYPUMWKTBR-UHFFFAOYSA-N 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 5
- 150000001716 carbazoles Chemical class 0.000 description 5
- 125000005842 heteroatom Chemical group 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 238000001161 time-correlated single photon counting Methods 0.000 description 5
- TXBFHHYSJNVGBX-UHFFFAOYSA-N (4-diphenylphosphorylphenyl)-triphenylsilane Chemical compound C=1C=CC=CC=1P(C=1C=CC(=CC=1)[Si](C=1C=CC=CC=1)(C=1C=CC=CC=1)C=1C=CC=CC=1)(=O)C1=CC=CC=C1 TXBFHHYSJNVGBX-UHFFFAOYSA-N 0.000 description 4
- VFUDMQLBKNMONU-UHFFFAOYSA-N 9-[4-(4-carbazol-9-ylphenyl)phenyl]carbazole Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 VFUDMQLBKNMONU-UHFFFAOYSA-N 0.000 description 4
- 241001164823 Adeno-associated virus - 7 Species 0.000 description 4
- 101000837344 Homo sapiens T-cell leukemia translocation-altered gene protein Proteins 0.000 description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- 102100028692 T-cell leukemia translocation-altered gene protein Human genes 0.000 description 4
- 239000007983 Tris buffer Substances 0.000 description 4
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- TXCDCPKCNAJMEE-UHFFFAOYSA-N dibenzofuran Chemical compound C1=CC=C2C3=CC=CC=C3OC2=C1 TXCDCPKCNAJMEE-UHFFFAOYSA-N 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 230000005281 excited state Effects 0.000 description 4
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 4
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 4
- 229960002796 polystyrene sulfonate Drugs 0.000 description 4
- 239000011970 polystyrene sulfonate Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 4
- XOYZGLGJSAZOAG-UHFFFAOYSA-N 1-n,1-n,4-n-triphenyl-4-n-[4-[4-(n-[4-(n-phenylanilino)phenyl]anilino)phenyl]phenyl]benzene-1,4-diamine Chemical compound C1=CC=CC=C1N(C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC(=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 XOYZGLGJSAZOAG-UHFFFAOYSA-N 0.000 description 3
- SPDPTFAJSFKAMT-UHFFFAOYSA-N 1-n-[4-[4-(n-[4-(3-methyl-n-(3-methylphenyl)anilino)phenyl]anilino)phenyl]phenyl]-4-n,4-n-bis(3-methylphenyl)-1-n-phenylbenzene-1,4-diamine Chemical compound CC1=CC=CC(N(C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=CC(=CC=2)C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=CC(=CC=2)N(C=2C=C(C)C=CC=2)C=2C=C(C)C=CC=2)C=2C=C(C)C=CC=2)=C1 SPDPTFAJSFKAMT-UHFFFAOYSA-N 0.000 description 3
- MQRCTQVBZYBPQE-UHFFFAOYSA-N 189363-47-1 Chemical compound C1=CC=CC=C1N(C=1C=C2C3(C4=CC(=CC=C4C2=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC(=CC=C1C1=CC=C(C=C13)N(C=1C=CC=CC=1)C=1C=CC=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 MQRCTQVBZYBPQE-UHFFFAOYSA-N 0.000 description 3
- GKWLILHTTGWKLQ-UHFFFAOYSA-N 2,3-dihydrothieno[3,4-b][1,4]dioxine Chemical compound O1CCOC2=CSC=C21 GKWLILHTTGWKLQ-UHFFFAOYSA-N 0.000 description 3
- PWJYOTPKLOICJK-UHFFFAOYSA-N 2-methyl-9h-carbazole Chemical compound C1=CC=C2C3=CC=C(C)C=C3NC2=C1 PWJYOTPKLOICJK-UHFFFAOYSA-N 0.000 description 3
- WPUSEOSICYGUEW-UHFFFAOYSA-N 4-[4-(4-methoxy-n-(4-methoxyphenyl)anilino)phenyl]-n,n-bis(4-methoxyphenyl)aniline Chemical compound C1=CC(OC)=CC=C1N(C=1C=CC(=CC=1)C=1C=CC(=CC=1)N(C=1C=CC(OC)=CC=1)C=1C=CC(OC)=CC=1)C1=CC=C(OC)C=C1 WPUSEOSICYGUEW-UHFFFAOYSA-N 0.000 description 3
- ZLHINBZEEMIWIR-UHFFFAOYSA-N 9-(3-dibenzothiophen-2-ylphenyl)carbazole Chemical compound C1=CC=C2C3=CC(C=4C=CC=C(C=4)N4C5=CC=CC=C5C5=CC=CC=C54)=CC=C3SC2=C1 ZLHINBZEEMIWIR-UHFFFAOYSA-N 0.000 description 3
- WHMHUGLMCAFKFE-UHFFFAOYSA-N 9-[3,5-di(dibenzofuran-2-yl)phenyl]carbazole Chemical compound C1=CC=C2C3=CC(C=4C=C(C=C(C=4)N4C5=CC=CC=C5C5=CC=CC=C54)C4=CC=C5OC=6C(C5=C4)=CC=CC=6)=CC=C3OC2=C1 WHMHUGLMCAFKFE-UHFFFAOYSA-N 0.000 description 3
- XVBYZOSXOUDFKJ-UHFFFAOYSA-N 9-[3,5-di(dibenzothiophen-2-yl)phenyl]carbazole Chemical compound C1=C(C=CC=2SC3=C(C=21)C=CC=C3)C=1C=C(C=C(C=1)C1=CC2=C(SC3=C2C=CC=C3)C=C1)N1C2=CC=CC=C2C=2C=CC=CC1=2 XVBYZOSXOUDFKJ-UHFFFAOYSA-N 0.000 description 3
- 238000003775 Density Functional Theory Methods 0.000 description 3
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- WIHKEPSYODOQJR-UHFFFAOYSA-N [9-(4-tert-butylphenyl)-6-triphenylsilylcarbazol-3-yl]-triphenylsilane Chemical compound C1=CC(C(C)(C)C)=CC=C1N1C2=CC=C([Si](C=3C=CC=CC=3)(C=3C=CC=CC=3)C=3C=CC=CC=3)C=C2C2=CC([Si](C=3C=CC=CC=3)(C=3C=CC=CC=3)C=3C=CC=CC=3)=CC=C21 WIHKEPSYODOQJR-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 3
- ZADPBFCGQRWHPN-UHFFFAOYSA-N boronic acid Chemical compound OBO ZADPBFCGQRWHPN-UHFFFAOYSA-N 0.000 description 3
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- 230000003247 decreasing effect Effects 0.000 description 3
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- 239000002019 doping agent Substances 0.000 description 3
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
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- 239000004332 silver Substances 0.000 description 3
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- 229940062627 tribasic potassium phosphate Drugs 0.000 description 3
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 3
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical compound C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 description 2
- ATTVYRDSOVWELU-UHFFFAOYSA-N 1-diphenylphosphoryl-2-(2-diphenylphosphorylphenoxy)benzene Chemical compound C=1C=CC=CC=1P(C=1C(=CC=CC=1)OC=1C(=CC=CC=1)P(=O)(C=1C=CC=CC=1)C=1C=CC=CC=1)(=O)C1=CC=CC=C1 ATTVYRDSOVWELU-UHFFFAOYSA-N 0.000 description 2
- FQABTURRFUZZBZ-UHFFFAOYSA-N 2,4,6-tris(9,9'-spirobi[fluorene]-2-yl)-1,3,5-triazine Chemical compound C12=CC=CC=C2C2=CC=CC=C2C1(C1=C2)C3=CC=CC=C3C1=CC=C2C1=NC(C=2C=C3C4(C5=CC=CC=C5C5=CC=CC=C54)C4=CC=CC=C4C3=CC=2)=NC(C2=CC=C3C4=CC=CC=C4C4(C3=C2)C2=CC=CC=C2C=2C4=CC=CC=2)=N1 FQABTURRFUZZBZ-UHFFFAOYSA-N 0.000 description 2
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- ZOKIJILZFXPFTO-UHFFFAOYSA-N 4-methyl-n-[4-[1-[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]cyclohexyl]phenyl]-n-(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C1(CCCCC1)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 ZOKIJILZFXPFTO-UHFFFAOYSA-N 0.000 description 2
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- KYQCOXFCLRTKLS-UHFFFAOYSA-N Pyrazine Chemical compound C1=CN=CC=N1 KYQCOXFCLRTKLS-UHFFFAOYSA-N 0.000 description 2
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- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 2
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 2
- DZBUGLKDJFMEHC-UHFFFAOYSA-N acridine Chemical compound C1=CC=CC2=CC3=CC=CC=C3N=C21 DZBUGLKDJFMEHC-UHFFFAOYSA-N 0.000 description 2
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- 238000004057 DFT-B3LYP calculation Methods 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
- C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
- C07D403/10—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings linked by a carbon chain containing aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/86—Carbazoles; Hydrogenated carbazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
- C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
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Definitions
- the invention relates to organic molecules and their use in organic light-emitting diodes (OLEDs) and in other optoelectronic devices.
- the object of the present invention is to provide molecules which are suitable for use in optoelectronic devices.
- the organic molecules are purely organic molecules, i.e. they do not contain any metal ions in contrast to metal complexes known for use in optoelectronic devices.
- the organic molecules exhibit emission maxima in the blue, sky-blue or green spectral range.
- the organic molecules exhibit in particular emission maxima between 420 nm and 520 nm, preferably between 440 nm and 495 nm, more preferably between 450 nm and 470 nm.
- the photoluminescence quantum yields of the organic molecules according to the invention are, in particular, 70 % or more.
- the molecules according to the invention exhibit in particular thermally activated delayed fluorescence (TADF).
- TADF thermally activated delayed fluorescence
- organic molecules according to the invention comprise or consist of a first chemical moiety comprising or consisting of a structure of Formula I, and
- the substituents R a , R 3 , R 4 or R 5 independently from each other can optionally form a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system with one or more substituents R a , R 3 , R 4 or R 5 .
- exactly one substituent selected from the group consisting of W, X, and Y is CN or CF 3
- exactly two substituents selected from the group consisting of T, V, W, X and Y represent the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties.
- R 1 and R 2 is at each occurrence independently from another selected from the group consisting of H, methyl and phenyl.
- W is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties, or is selected from the group consisting of CN and CF 3 .
- W is CN
- the two second chemical moieties each at each occurrence independently from another comprise or consist of a structure of Formula Ila: wherein # and R a are defined as above.
- R a is at each occurrence independently from another selected from the group consisting of H, Me, i Pr, t Bu, CN, CF 3 , Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, triazinyl, which
- R a is at each occurrence independently from another selected from the group consisting of H, Me, i Pr, t Bu, CN, CF 3 , Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, and triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph.
- R a is at each occurrence independently from another selected from the group consisting of H, Me, t Bu, Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph.
- R a is H at each occurrence.
- the two second chemical moieties each at each occurrence independently from another comprise or consist of a structure of Formula IIb, a structure of Formula IIb-2, a structure of Formula IIb-3 or a structure of Formula IIb-4: wherein
- the two second chemical moieties each at each occurrence independently from another comprise or consist of a structure of Formula IIc, a structure of Formula IIc-2, a structure of Formula IIc-3 or a structure of Formula IIc-4: wherein the aforementioned definitions apply.
- R b is at each occurrence independently from another selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, triazinyl, which is optional
- R b is at each occurrence independently from another selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, and triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph.
- R b is at each occurrence independently from another selected from the group consisting of Me, t Bu, Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph.
- R a and R 5 is at each occurrence independently from another selected from the group consisting of hydrogen (H), methyl (Me), i-propyl (CH(CH 3 ) 2 ) ( i Pr), t-butyl ( t Bu), phenyl (Ph), CN, CF 3 , and diphenylamine (NPh 2 ).
- the organic molecules comprise or consist of a structure of Formula III-1 or Formula III-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IIIa-1 or Formula IIIa-2: wherein
- the organic molecules comprise or consist of a structure of Formula IIIb-1 or Formula IIIb-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IIIc-1 or Formula IIIc-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IIId-1 or Formula IIId-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IIIe-1 or Formula IIIe-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IIIf-1 or Formula IIIf-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IIIg-1 or Formula IIIg-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IIIh-1 or Formula IIIh-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IV-1 or Formula IV-2: wherein the aforementioned definitions.
- the organic molecules comprise or consist of a structure of Formula IVa-1 or Formula IVa-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IVb-1 or Formula IVb-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IVc-1 or Formula IVc-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IVd-1 or Formula IVd-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IVe-1 or Formula IVe-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IVf-1 or Formula IVf-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IVg-1 or Formula IVg-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IVh-1 or Formula IVh-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula V-1 or Formula V-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Va-1 or Formula Va-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vb-1 or Formula Vb-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vc-1 or Formula Vc-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vd-1 or Formula Vd-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Ve-1 or Formula Ve-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vf-1 or Formula Vf-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vg-1 or Formula Vg-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vh-1 or Formula Vh-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula VI-1 or Formula VI-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vla-1 or Formula Vla-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlb-1 or Formula Vlb-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlc-1 or Formula Vlc-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vld-1 or Formula Vld-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vle-1 or Formula Vle-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlf-1 or Formula Vlf-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlg-1 or Formula Vlg-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlh-1 or Formula Vlh-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula VII-1 or Formula VII-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlla-1 or Formula Vlla-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vllb-1 or Formula Vllb-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vllc-1 or Formula Vllc-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlld-1 or Formula Vlld-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlle-1 or Formula Vlle-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vllf-1 or Formula Vllf-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vllg-1 or Formula Vllg-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vllh-1 or Formula Vllh-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula VIII-1 or Formula VIII-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vllla-1 or Formula Vllla-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlllb-1 or Formula Vlllb-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlllc-1 or Formula Vlllc-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vllld-1 or Formula Vllld-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vllle-1 or Formula Vllle-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlllf-1 or Formula Vlllf-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlllg-1 or Formula Vlllg-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula Vlllh-1 or Formula Vlllh-2: wherein the aforementioned definitions apply.
- R c is at each occurrence independently from another selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph, and triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 , and Ph.
- R c is at each occurrence independently from another selected from the group consisting of Me, t Bu, Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 and Ph; and triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, i Pr, t Bu, CN, CF 3 and Ph.
- aryl and aromatic may be understood in the broadest sense as any mono-, bi- or polycyclic aromatic moieties. Accordingly, an aryl group contains 6 to 60 aromatic ring atoms, and a heteroaryl group contains 5 to 60 aromatic ring atoms, of which at least one is a heteroatom. Notwithstanding, throughout the application the number of aromatic ring atoms may be given as subscripted number in the definition of certain substituents. In particular, the heteroaromatic ring includes one to three heteroatoms.
- heteroaryl and “heteroaromatic” may be understood in the broadest sense as any mono-, bi- or polycyclic hetero-aromatic moieties that include at least one heteroatom.
- the heteroatoms may at each occurrence be the same or different and be individually selected from the group consisting of N, O and S.
- arylene refers to a divalent substituent that bears two binding sites to other molecular structures and thereby serving as a linker structure.
- a group in the exemplary embodiments is defined differently from the definitions given here, for example, the number of aromatic ring atoms or number of heteroatoms differs from the given definition, the definition in the exemplary embodiments is to be applied.
- a condensed (annulated) aromatic or heteroaromatic polycycle is built of two or more single aromatic or heteroaromatic cycles, which formed the polycycle via a condensation reaction.
- aryl group or heteroaryl group comprises groups which can be bound via any position of the aromatic or heteroaromatic group, derived from benzene, naphthaline, anthracene, phenanthrene, pyrene, dihydropyrene, chrysene, perylene, fluoranthene, benzanthracene, benzphenanthrene, tetracene, pentacene, benzpyrene, furan, benzofuran, isobenzofuran, dibenzofuran, thiophene, benzothiophene, isobenzothiophene, dibenzothiophene; pyrrole, indole, isoindole, carbazole, pyridine, quinoline, isoquinoline, acridine, phenanthridine, benzo-5,6-quinoline, benzo-6,7-quinoline, benzo-7,8-quinoline, phen
- cyclic group may be understood in the broadest sense as any mono-, bi- or polycyclic moieties.
- alkyl group may be understood in the broadest sense as any linear, branched, or cyclic alkyl substituent.
- the term alkyl comprises the substituents methyl (Me), ethyl (Et), n-propyl ( n Pr), i-propyl ( i Pr), cyclopropyl, n-butyl ( n Bu), i-butyl ( i Bu), s-butyl ( s Bu), t-butyl( t Bu), cyclobutyl, 2-methylbutyl, n-pentyl, s-pentyl, t-pentyl, 2-pentyl, neo-pentyl, cyclopentyl, n-hexyl, s-hexyl, t-hexyl, 2-hexyl, 3-hexyl, neo-hexyl, cyclohexyl, 1-methyl (Me), ethy
- alkenyl comprises linear, branched, and cyclic alkenyl substituents.
- alkenyl group exemplarily comprises the substituents ethenyl, propenyl, butenyl, pentenyl, cyclopentenyl, hexenyl, cyclohexenyl, heptenyl, cycloheptenyl, octenyl, cyclooctenyl or cyclooctadienyl.
- alkynyl comprises linear, branched, and cyclic alkynyl substituents.
- alkynyl group exemplarily comprises ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl or octynyl.
- alkoxy comprises linear, branched, and cyclic alkoxy substituents.
- alkoxy group exemplarily comprises methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy, s-butoxy, t-butoxy and 2-methylbutoxy.
- thioalkoxy comprises linear, branched, and cyclic thioalkoxy substituents, in which the O of the exemplarily alkoxy groups is replaced by S.
- halogen and “halo” may be understood in the broadest sense as being preferably fluorine, chlorine, bromine or iodine.
- the organic molecules according to the invention have an excited state lifetime of not more than 150 ⁇ s, of not more than 100 ⁇ s, in particular of not more than 50 ⁇ s, more preferably of not more than 10 ⁇ s or not more than 7 ⁇ s in a film of poly(methyl methacrylate) (PMMA) with 10% by weight of organic molecule at room temperature.
- PMMA poly(methyl methacrylate)
- the organic molecules according to the invention represent thermally-activated delayed fluorescence (TADF) emitters, which exhibit a ⁇ E ST value, which corresponds to the energy difference between the first excited singlet state (S1) and the first excited triplet state (T1), of less than 5000 cm -1 , preferably less than 3000 cm -1 , more preferably less than 1500 cm -1 , even more preferably less than 1000 cm -1 or even less than 500 cm -1 .
- TADF thermally-activated delayed fluorescence
- the organic molecules according to the invention have an emission peak in the visible or nearest ultraviolet range, i.e., in the range of a wavelength of from 380 to 800 nm, with a full width at half maximum of less than 0.50 eV, preferably less than 0.48 eV, more preferably less than 0.45 eV, even more preferably less than 0.43 eV or even less than 0.40 eV in a film of poly(methyl methacrylate) (PMMA) with 10% by weight of organic molecule at room temperature.
- PMMA poly(methyl methacrylate)
- the organic molecules according to the invention have a "blue material index" (BMI), calculated by dividing the photoluminescence quantum yield (PLQY) in % by the CIEy color coordinate of the emitted light, of more than 150, in particular more than 200, preferably more than 250, more preferably of more than 300 or even more than 500.
- BMI blue material index
- Orbital and excited state energies can be determined either by means of experimental methods or by calculations employing quantum-chemical methods, in particular density functional theory calculations.
- the energy of the highest occupied molecular orbital E HOMO is determined by methods known to the person skilled in the art from cyclic voltammetry measurements with an accuracy of 0.1 eV.
- the energy of the lowest unoccupied molecular orbital E LUMO is calculated as E HOMO + E gap , wherein E gap is determined as follows: For host compounds, the onset of the emission spectrum of a film with 10% by weight of host in poly(methyl methacrylate) (PMMA) is used as E gap , unless stated otherwise. For emitter molecules, E gap is determined as the energy at which the excitation and emission spectra of a film with 10% by weight of emitter in PMMA cross.
- the energy of the first excited triplet state T1 is determined from the onset of the emission spectrum at low temperature, typically at 77 K.
- the phosphorescence is usually visible in a steady-state spectrum in 2-Me-THF.
- the triplet energy can thus be determined as the onset of the phosphorescence spectrum.
- the energy of the first excited triplet state T1 is determined from the onset of the delayed emission spectrum at 77 K, if not otherwise stated measured in a film of) PMMA with 10% by weight of emitter.
- the energy of the first excited singlet state S1 is determined from the onset of the emission spectrum, if not otherwise stated measured in a film of PMMA with 10% by weight of host or emitter compound.
- the onset of an emission spectrum is determined by computing the intersection of the tangent to the emission spectrum with the x-axis.
- the tangent to the emission spectrum is set at the high-energy side of the emission band, i.e., where the emission band rises by going from higher energy values to lower energy values, and at the point at half maximum of the maximum intensity of the emission spectrum.
- a further aspect of the invention relates to a process for preparing organic molecules (with an optional subsequent reaction) according to the invention, wherein a 4,6-R 1 -5-R 2 -2-chloro/bromo-3-(trifluoromethyl)benzonitrile is used as a reactant:
- a boronic acid in the reaction for the synthesis of E1 a boronic acid can be used instead of a boronic acid ester.
- typical conditions include the use of a base, such as tribasic potassium phosphate or sodium hydride, for example, in an aprotic polar solvent, such as dimethyl sulfoxide (DMSO) or N,N-dimethylformamide (DMF), for example.
- a base such as tribasic potassium phosphate or sodium hydride
- an aprotic polar solvent such as dimethyl sulfoxide (DMSO) or N,N-dimethylformamide (DMF), for example.
- An alternative synthesis route comprises the introduction of a nitrogen heterocycle via copper- or palladium-catalyzed coupling to an aryl halide or aryl pseudohalide, preferably an aryl bromide, an aryl iodide, aryl triflate or an aryl tosylate.
- a further aspect of the invention relates to the use of an organic molecule according to the invention as a luminescent emitter or as an absorber, and/or as host material and/or as electron transport material, and/or as hole injection material, and/or as hole blocking material in an optoelectronic device.
- the organic electroluminescent device may be understood in the broadest sense as any device based on organic materials that is suitable for emitting light in the visible or nearest ultraviolet (UV) range, i.e., in the range of a wavelength of from 380 to 800 nm. More preferably, organic electroluminescent device may be able to emit light in the visible range, i.e., of from 400 to 800 nm.
- UV visible or nearest ultraviolet
- the optoelectronic device is more particularly selected from the group consisting of:
- the organic electroluminescent device is a device selected from the group consisting of an organic light emitting diode (OLED), a light emitting electrochemical cell (LEC), and a light-emitting transistor.
- OLED organic light emitting diode
- LEC light emitting electrochemical cell
- the fraction of the organic molecule according to the invention in the emission layer in an optoelectronic device, more particularly in OLEDs is 1 % to 99 % by weight, more particularly 5 % to 80 % by weight. In an alternative embodiment, the proportion of the organic molecule in the emission layer is 100 % by weight.
- the light-emitting layer comprises not only the organic molecules according to the invention but also a host material whose triplet (T1) and singlet (S1) energy levels are energetically higher than the triplet (T1) and singlet (S1) energy levels of the organic molecule.
- a further aspect of the invention relates to a composition
- a composition comprising or consisting of:
- the light-emitting layer comprises (or (essentially) consists of) a composition comprising or consisting of:
- the light-emitting layer EML comprises (or (essentially) consists of) a composition comprising or consisting of:
- energy can be transferred from the host compound H to the one or more organic molecules according to the invention, in particular transferred from the first excited triplet state T1(H) of the host compound H to the first excited triplet state T1(E) of the one or more organic molecules according to the invention and/ or from the first excited singlet state S1(H) of the host compound H to the first excited singlet state S1(E) of the one or more organic molecules according to the invention.
- the light-emitting layer EML comprises (or (essentially) consists of) a composition comprising or consisting of:
- the host compound H has a highest occupied molecular orbital HOMO(H) having an energy E HOMO (H) in the range of from -5 to -6.5 eV and the at least one further host compound D has a highest occupied molecular orbital HOMO(D) having an energy E HOMO (D), wherein E HOMO (H) > E HOMO (D).
- the host compound H has a lowest unoccupied molecular orbital LUMO(H) having an energy E LUMO (H) and the at least one further host compound D has a lowest unoccupied molecular orbital LUMO(D) having an energy E LUMO (D), wherein E LUMO (H) > E LUMO (D).
- the host compound H has a highest occupied molecular orbital HOMO(H) having an energy E HOMO (H) and a lowest unoccupied molecular orbital LUMO(H) having an energy E LUMO (H), and
- the invention relates to an optoelectronic device comprising an organic molecule or a composition of the type described here, more particularly in the form of a device selected from the group consisting of organic light-emitting diode (OLED), light-emitting electrochemical cell, OLED sensor, more particularly gas and vapour sensors not hermetically externally shielded, organic diode, organic solar cell, organic transistor, organic field-effect transistor, organic laser and down-conversion element.
- OLED organic light-emitting diode
- OLED sensor more particularly gas and vapour sensors not hermetically externally shielded
- organic diode organic solar cell
- organic transistor organic field-effect transistor
- organic laser and down-conversion element organic laser and down-conversion element
- the organic electroluminescent device is a device selected from the group consisting of an organic light emitting diode (OLED), a light emitting electrochemical cell (LEC), and a light-emitting transistor.
- OLED organic light emitting diode
- LEC light emitting electrochemical cell
- the organic molecule according to the invention is used as emission material in a light-emitting layer EML.
- the light-emitting layer EML consists of the composition according to the invention described here.
- organic electroluminescent device when the organic electroluminescent device is an OLED, it may exhibit the following layer structure:
- the organic electroluminescent device may optionally comprise one or more protective layers protecting the device from damaging exposure to harmful species in the environment including, exemplarily moisture, vapor and/or gases.
- the organic electroluminescent device is an OLED, which exhibits the following inverted layer structure:
- the OLED with an inverted layer structure comprises each layer only optionally, different layers may be merged and the OLED may comprise more than one layer of each layer types defined above.
- the organic electroluminescent device is an OLED, which may exhibit stacked architecture.
- this architecture contrary to the typical arrangement, where the OLEDs are placed side by side, the individual units are stacked on top of each other.
- Blended light may be generated with OLEDs exhibiting a stacked architecture, in particular white light may be generated by stacking blue, green and red OLEDs.
- the OLED exhibiting a stacked architecture may optionally comprise a charge generation layer (CGL), which is typically located between two OLED subunits and typically consists of a n-doped and p-doped layer with the n-doped layer of one CGL being typically located closer to the anode layer.
- CGL charge generation layer
- the organic electroluminescent device is an OLED, which comprises two or more emission layers between anode and cathode.
- this so-called tandem OLED comprises three emission layers, wherein one emission layer emits red light, one emission layer emits green light and one emission layer emits blue light, and optionally may comprise further layers such as charge generation layers, blocking or transporting layers between the individual emission layers.
- the emission layers are adjacently stacked.
- the tandem OLED comprises a charge generation layer between each two emission layers.
- adjacent emission layers or emission layers separated by a charge generation layer may be merged.
- the substrate may be formed by any material or composition of materials. Most frequently, glass slides are used as substrates. Alternatively, thin metal layers (e.g., copper, gold, silver or aluminum films) or plastic films or slides may be used. This may allow a higher degree of flexibility.
- the anode layer A is mostly composed of materials allowing to obtain an (essentially) transparent film. As at least one of both electrodes should be (essentially) transparent in order to allow light emission from the OLED, either the anode layer A or the cathode layer C is transparent.
- the anode layer A comprises a large content or even consists of transparent conductive oxides (TCOs).
- Such anode layer A may exemplarily comprise indium tin oxide, aluminum zinc oxide, fluorine doped tin oxide, indium zinc oxide, PbO, SnO, zirconium oxide, molybdenum oxide, vanadium oxide, wolfram oxide, graphite, doped Si, doped Ge, doped GaAs, doped polyaniline, doped polypyrrol and/or doped polythiophene.
- the anode layer A (essentially) consists of indium tin oxide (ITO) (e.g., (InO3)0.9(SnO2)0.1).
- ITO indium tin oxide
- TCOs transparent conductive oxides
- HIL hole injection layer
- the HIL may facilitate the injection of quasi charge carriers (i.e., holes) in that the transport of the quasi charge carriers from the TCO to the hole transport layer (HTL) is facilitated.
- the hole injection layer may comprise poly-3,4-ethylendioxy thiophene (PEDOT), polystyrene sulfonate (PSS), MoO 2 , V 2 O 5 , CuPC or Cul, in particular a mixture of PEDOT and PSS.
- the hole injection layer (HIL) may also prevent the diffusion of metals from the anode layer A into the hole transport layer (HTL).
- the HIL may exemplarily comprise PEDOT:PSS (poly-3,4-ethylendioxy thiophene: polystyrene sulfonate), PEDOT (poly-3,4-ethylendioxy thiophene), mMTDATA (4,4',4"-tris[phenyl(m-tolyl)amino]triphenylamine), Spiro-TAD (2,2',7,7'-tetrakis(n,n-diphenylamino)-9,9'-spirobifluorene), DNTPD (N1,N1'-(biphenyl-4,4'-diyl)bis(N1-phenyl-N4,N4-di-m-tolylbenzene-1,4-diamine), NPB (N,N'-nis-(1-naphthalenyl)-N,N'-bisphenyl-(1,1'-biphenyl)-4,4'
- HTL hole transport layer
- any hole transport compound may be used.
- electron-rich heteroaromatic compounds such as triarylamines and/or carbazoles may be used as hole transport compound.
- the HTL may decrease the energy barrier between the anode layer A and the light-emitting layer EML.
- the hole transport layer (HTL) may also be an electron blocking layer (EBL).
- EBL electron blocking layer
- hole transport compounds bear comparably high energy levels of their triplet states T1.
- the hole transport layer may comprise a star-shaped heterocycle such as tris(4-carbazoyl-9-ylphenyl)amine (TCTA), poly-TPD (poly(4-butylphenyl-diphenyl-amine)), [alpha]-NPD (poly(4-butylphenyl-diphenyl-amine)), TAPC (4,4'-cyclohexyliden-bis[N,N-bis(4-methylphenyl)benzenamine]), 2-TNATA (4,4',4"-tris[2-naphthyl(phenyl)amino]triphenylamine), Spiro-TAD, DNTPD, NPB, NPNPB, MeO-TPD, HAT-CN and/or TrisPcz (9,9'-diphenyl-6-(9-phenyl-9H-carbazol-3-yl)-9H,9'H-3,3'-bicarbazole).
- TCTA tris(4-car
- the HTL may comprise a p-doped layer, which may be composed of an inorganic or organic dopant in an organic hole-transporting matrix.
- Transition metal oxides such as vanadium oxide, molybdenum oxide or tungsten oxide may exemplarily be used as inorganic dopant.
- Tetrafluorotetracyanoquinodimethane (F4-TCNQ), copper-pentafluorobenzoate (Cu(I)pFBz) or transition metal complexes may exemplarily be used as organic dopant.
- the EBL may exemplarily comprise mCP (1,3-bis(carbazol-9-yl)benzene), TCTA, 2-TNATA, mCBP (3,3-di(9H-carbazol-9-yl)biphenyl), tris-Pcz, CzSi (9-(4-tert-Butylphenyl)-3,6-bis(triphenylsilyl)-9H-carbazole), and/or DCB (N,N'-dicarbazolyl-1,4-dimethylbenzene).
- the light-emitting layer EML Adjacent to the hole transport layer (HTL), typically, the light-emitting layer EML is located.
- the light-emitting layer EML comprises at least one light emitting molecule.
- the EML comprises at least one light emitting molecule according to the invention.
- the light-emitting layer comprises only the organic molecules according to the invention.
- the EML additionally comprises one or more host material.
- the host material is selected from CBP (4,4'-Bis-(N-carbazolyl)-biphenyl), mCP, mCBP Sif87 (dibenzo[b,d]thiophen-2-yltriphenylsilane), CzSi, Sif88 (dibenzo[b,d]thiophen-2-yl)diphenylsilane), DPEPO (bis[2-(diphenylphosphino)phenyl] ether oxide), 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole, 9-[3,5-bis(2-d
- the EML comprises a so-called mixed-host system with at least one hole-dominant host and one electron-dominant host.
- the EML comprises exactly one light emitting molecule according to the invention and a mixed-host system comprising T2T as electron-dominant host and a host selected from CBP, mCP, mCBP, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole and 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H-carbazole as hole-dominant host.
- the EML comprises 50-80 % by weight, preferably 60-75 % by weight of a host selected from CBP, mCP, mCBP, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole and 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H-carbazole; 10-45 % by weight, preferably 15-30 % by weight of T2T and 5-40 % by weight, preferably 10-30 % by weight of light emitting molecule according to the invention.
- a host selected from CBP, mCP, mCBP
- an electron transport layer Adjacent to the light-emitting layer EML an electron transport layer (ETL) may be located.
- ETL electron transport layer
- any electron transporter may be used.
- compounds poor of electrons such as, e.g., benzimidazoles, pyridines, triazoles, oxadiazoles (e.g., 1,3,4-oxadiazole), phosphinoxides and sulfone, may be used.
- An electron transporter may also be a star-shaped heterocycle such as 1,3,5-tri(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl (TPBi).
- the ETL may comprise NBphen (2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline), Alq3 (Aluminum-tris(8-hydroxyquinoline)), TSPO1 (diphenyl-4-triphenylsilylphenyl-phosphinoxide), BPyTP2 (2,7-di(2,2'-bipyridin-5-yl)triphenyle), Sif87 (dibenzo[b,d]thiophen-2-yltriphenylsilane), Sif88 (dibenzo[b,d]thiophen-2-yl)diphenylsilane), BmPyPhB (1,3-bis[3,5-di(pyridin-3-yl)phenyl]benzene) and/or BTB (4,4'-bis-[2-(4,6-diphenyl-1,3,5-triazinyl)]-1,1'-biphenyl
- the ETL may be doped with materials such as Liq.
- the electron transport layer (ETL) may also block holes or a holeblocking layer (HBL) is introduced.
- a cathode layer C Adjacent to the electron transport layer (ETL), a cathode layer C may be located.
- the cathode layer C may comprise or may consist of a metal (e.g., Al, Au, Ag, Pt, Cu, Zn, Ni, Fe, Pb, LiF, Ca, Ba, Mg, In, W, or Pd) or a metal alloy.
- the cathode layer may also consist of (essentially) intransparent metals such as Mg, Ca, or Al.
- the cathode layer C may also comprise graphite and or carbon nanotubes (CNTs).
- the cathode layer C may also consist of nanoscalic silver wires.
- An OLED may further, optionally, comprise a protection layer between the electron transport layer (ETL) and the cathode layer C (which may be designated as electron injection layer (EIL)).
- This layer may comprise lithium fluoride, cesium fluoride, silver, Liq (8-hydroxyquinolinolatolithium), Li 2 O, BaF 2 , MgO, and/or NaF.
- the electron transport layer (ETL) and/or a hole blocking layer (HBL) may comprise one or more host compounds.
- the light-emitting layer EML may further comprise one or more further emitter molecule F.
- an emitter molecule F may be any emitter molecule known in the art.
- an emitter molecule F is a molecule with a structure differing from the structure of the molecules according to the invention.
- the emitter molecule F may optionally be a TADF emitter.
- the emitter molecule F may optionally be a fluorescent and/or phosphorescent emitter molecule which is able to shift the emission spectrum and/or the absorption spectrum of the light-emitting layer EML.
- the triplet and/or singlet excitons may be transferred from the emitter molecule according to the invention to the emitter molecule F before relaxing to the ground state S0 by emitting light typically red-shifted in comparison to the light emitted by emitter molecule E.
- the emitter molecule F may also provoke two-photon effects (i.e., the absorption of two photons of half the energy of the absorption maximum).
- an organic electroluminescent device e.g., an OLED
- an organic electroluminescent device may exemplarily be an essentially white organic electroluminescent device.
- white organic electroluminescent device may comprise at least one (deep) blue emitter molecule and one or more emitter molecules emitting green and/or red light. Then, there may also optionally be energy transmittance between two or more molecules as described above.
- the designation of the colors of emitted and/or absorbed light is as follows:
- a deep blue emitter has an emission maximum in the range of from >420 to 480 nm
- a sky blue emitter has an emission maximum in the range of from >480 to 500 nm
- a green emitter has an emission maximum in a range of from >500 to 560 nm
- a red emitter has an emission maximum in a range of from >620 to 800 nm.
- a deep blue emitter may preferably have an emission maximum of below 480 nm, more preferably below 470 nm, even more preferably below 465 nm or even below 460 nm. It will typically be above 420 nm, preferably above 430 nm, more preferably above 440 nm or even above 450 nm.
- a further aspect of the present invention relates to an OLED, which exhibits an external quantum efficiency at 1000 cd/m2 of more than 8%, more preferably of more than 10%, more preferably of more than 13%, even more preferably of more than 15% or even more than 20% and/or exhibits an emission maximum between 420 nm and 500 nm, preferably between 430 nm and 490 nm, more preferably between 440 nm and 480 nm, even more preferably between 450 nm and 470 nm and/or exhibits a LT80 value at 500 cd/m2 of more than 100 h, preferably more than 200 h, more preferably more than 400 h, even more preferably more than 750 h or even more than 1000 h.
- a further aspect of the present invention relates to an OLED, whose emission exhibits a CIEy color coordinate of less than 0.45, preferably less than 0.30, more preferably less than 0.20 or even more preferably less than 0.15 or even less than 0.10.
- a further aspect of the present invention relates to an OLED, which emits light at a distinct color point.
- the OLED emits light with a narrow emission band (small full width at half maximum (FWHM)).
- FWHM full width at half maximum
- the OLED according to the invention emits light with a FWHM of the main emission peak of less than 0.50 eV, preferably less than 0.48 eV, more preferably less than 0.45 eV, even more preferably less than 0.43 eV or even less than 0.40 eV.
- UHD Ultra High Definition
- typically top-emitting (top-electrode is transparent) devices are used, whereas test devices as used throughout the present application represent bottom-emitting devices (bottom-electrode and substrate are transparent).
- the CIEy color coordinate of a blue device can be reduced by up to a factor of two, when changing from a bottom- to a top-emitting device, while the CIEx remains nearly unchanged ( Okinaka et al. (2015), 22.1: Invited Paper: New Fluorescent Blue Host Materials for Achieving Low Voltage in OLEDs, SID Symposium Digest of Technical Papers, 46; doi:10.1002/sdtp.10480 ).
- a further aspect of the present invention relates to an OLED, whose emission exhibits a CIEx color coordinate of between 0.02 and 0.30, preferably between 0.03 and 0.25, more preferably between 0.05 and 0.20 or even more preferably between 0.08 and 0.18 or even between 0.10 and 0.15 and/ or a CIEy color coordinate of between 0.00 and 0.45, preferably between 0.01 and 0.30, more preferably between 0.02 and 0.20 or even more preferably between 0.03 and 0.15 or even between 0.04 and 0.10.
- the invention relates to a method for producing an optoelectronic component.
- an organic molecule of the invention is used.
- the organic electroluminescent device in particular the OLED according to the present invention can be fabricated by any means of vapor deposition and/ or liquid processing. Accordingly, at least one layer is
- the methods used to fabricate the organic electroluminescent device, in particular the OLED according to the present invention are known in the art.
- the different layers are individually and successively deposited on a suitable substrate by means of subsequent deposition processes.
- the individual layers may be deposited using the same or differing deposition methods.
- Vapor deposition processes exemplarily comprise thermal (co)evaporation, chemical vapor deposition and physical vapor deposition.
- an AMOLED backplane is used as substrate.
- the individual layer may be processed from solutions or dispersions employing adequate solvents.
- Solution deposition process exemplarily comprise spin coating, dip coating and jet printing.
- Liquid processing may optionally be carried out in an inert atmosphere (e.g., in a nitrogen atmosphere) and the solvent may optionally be completely or partially removed by means known in the state of the art.
- a corresponding boronic acid may be used instead of a boronic acid ester a corresponding boronic acid may be used.
- Z2 The synthesis of Z2 is carried out according to AAV1, wherein 2-chloro-3-(trifluoromethyl)benzonitrile E2 reacts with 3-cyano/(trifluoromethyl)-2,4-difluoro-boronic acid pinacol ester.
- Z3 The synthesis of Z3 is carried out according to AAV1, wherein 2-chloro-3-(trifluoromethyl)benzonitrile E2 reacts with 4-cyano/(trifluoromethyl)-2,6-difluoro-boronic acid pinacol ester.
- Z4 The synthesis of Z4 is carried out according to AAV1, wherein 2-chloro-3-(trifluoromethyl)benzonitrile E2 reacts with 4-cyano/(trifluoromethyl)-2,5-difluoro-boronic acid pinacol ester.
- Z5 The synthesis of Z5 is carried out according to AAV1, wherein 2-chloro-3-(trifluoromethyl)benzonitrile E2 reacts with 2-cyano/(trifluoromethyl)-4,5-difluoro-boronic acid pinacol ester.
- Z6 The synthesis of Z6 is carried out according to AAV1, wherein 2-chloro-3-(trifluoromethyl)benzonitrile E2 reacts with 3-cyano/(trifluoromethyl)-4,5-difluoro-boronic acid pinacol ester.
- the donor molecule D-H is a 3,6-substituted carbazole (e.g., 3,6-dimethylcarbazole, 3,6-diphenylcarbazole, 3,6-di-tert-butylcarbazole), a 2,7-substituted carbazole (e.g., 2,7-dimethylcarbazole, 2,7-diphenylcarbazole, 2,7-di-tert-butylcarbazole), a 1,8-substituted carbazole (e.g., 1,8-dimethylcarbazole, 1,8-diphenylcarbazole, 1,8-di-tert-butylcarbazole), a 1-substituted carbazole (e.g., 1-methylcarbazole, 1-phenylcarbazole, 1-tert-butylcarbazole), a 2-substituted carbazole (e.g., 2-methylcarbazol,
- a halogen-substituted carbazole particularly 3-bromocarbazole
- D-H a boronic acid ester functional group or boronic acid functional group
- a boronic acid ester functional group or boronic acid functional group may be exemplarily introduced at the position of the one or more halogen substituents, which was introduced via D-H, to yield the corresponding carbazol-3-ylboronic acid ester or carbazol-3-ylboronic acid, e.g., via the reaction with bis(pinacolato)diboron ( CAS No. 73183-34-3 ).
- one or more substituents R a may be introduced in place of the boronic acid ester group or the boronic acid group via a coupling reaction with the corresponding halogenated reactant R a -Hal, preferably R a -Cl and R a -Br.
- one or more substituents R a may be introduced at the position of the one or more halogen substituents, which was introduced via D-H, via the reaction with a boronic acid of the substituent R a [R a -B(OH) 2 ] or a corresponding boronic acid ester.
- HPLC-MS spectroscopy is performed on a HPLC by Agilent (1100 series) with MS-detector (Thermo LTQ XL).
- a reverse phase column 4,6mm x 150mm, particle size 5,0 ⁇ m from Waters (without pre-column) is used in the HPLC.
- the HPLC-MS measurements are performed at room temperature (rt) with the solvents acetonitrile, water and THF in the following concentrations: solvent A: H 2 O (90%) MeCN (10%) solvent B: H 2 O (10%) MeCN (90%) solvent C: THF (50%) MeCN (50%)
- Cyclic voltammograms are measured from solutions having concentration of 10 -3 mol/l of the organic molecules in dichloromethane or a suitable solvent and a suitable supporting electrolyte (e.g. 0.1 mol/l of tetrabutylammonium hexafluorophosphate).
- the measurements are conducted at room temperature under nitrogen atmosphere with a three-electrode assembly (Working and counter electrodes: Pt wire, reference electrode: Pt wire) and calibrated using FeCp 2 /FeCp 2 + as internal standard.
- the HOMO data was corrected using ferrocene as internal standard against SCE.
- BP86 BP86 functional and the resolution of identity approach (RI).
- Excitation energies are calculated using the (BP86) optimized structures employing Time-Dependent DFT (TD-DFT) methods.
- Orbital and excited state energies are calculated with the B3LYP functional.
- Def2-SVP basis sets and a m4-grid for numerical integration are used.
- the Turbomole program package is used for all calculations.
- the sample concentration is 10 mg/ml, dissolved in a suitable solvent.
- Photoluminescence spectroscopy and TCSPC Time-correlated single-photon counting
- Steady-state emission spectroscopy is measured by a Horiba Scientific, Modell FluoroMax-4 equipped with a 150 W Xenon-Arc lamp, excitation- and emissions monochromators and a Hamamatsu R928 photomultiplier and a time-correlated single-photon counting option. Emissions and excitation spectra are corrected using standard correction fits.
- Excited state lifetimes are determined employing the same system using the TCSPC method with FM-2013 equipment and a Horiba Yvon TCSPC hub. Excitation sources:
- Data analysis is done using the software suite DataStation and DAS6 analysis software. The fit is specified using the chi-squared-test.
- Emission maxima are given in nm, quantum yields ⁇ in % and CIE coordinates as x,y values.
- PLQY is determined using the following protocol:
- OLED devices comprising organic molecules according to the invention can be produced via vacuum-deposition methods. If a layer contains more than one compound, the weight-percentage of one or more compounds is given in %. The total weight-percentage values amount to 100 %, thus if a value is not given, the fraction of this compound equals to the difference between the given values and 100%.
- the not fully optimized OLEDs are characterized using standard methods and measuring electroluminescence spectra, the external quantum efficiency (in %) in dependency on the intensity, calculated using the light detected by the photodiode, and the current.
- the OLED device lifetime is extracted from the change of the luminance during operation at constant current density.
- the LT50 value corresponds to the time, where the measured luminance decreased to 50 % of the initial luminance
- analogously LT80 corresponds to the time point, at which the measured luminance decreased to 80 % of the initial luminance
- LT 95 to the time point at which the measured luminance decreased to 95 % of the initial luminance etc.
- Example 1 was synthesized according to AAV1 (81% yield) and AAV7 (43% yield). MS (HPLC-MS), m/z (retention time): 826.48 (11.17 min).
- Figure 1 depicts the emission spectrum of example 1 (10% by weight in PMMA).
- the emission maximum is at 462 nm.
- the photoluminescence quantum yield (PLQY) is 82%, the full width at half maximum is 0.46 eV and the emission lifetime is 6.8 ⁇ s.
- the resulting CIE x coordinate is determined at 0.16 and the CIE y coordinate at 0.20.
- Example 2 was synthesized according to AAV1 (81% yield) and AAV7 (91% yield). MS (HPLC-MS), m/z (retention time): 906.48 (10.15 min).
- Figure 2 depicts the emission spectrum of example 2 (10% by weight in PMMA).
- the emission maximum is at 475 nm.
- the photoluminescence quantum yield (PLQY) is 81%, the full width at half maximum is 0.46 eV and the emission lifetime is 14.8 ⁇ s.
- the resulting CIE x coordinate is determined at 0.18 and the CIE y coordinate at 0.27.
- Example 3 was synthesized according to AAV1 (81% yield) and AAV7 (87% yield). MS (HPLC-MS), m/z (retention time): 866.47 (10.72 min).
- Figure 3 depicts the emission spectrum of example 3 (10% by weight in PMMA).
- the emission maximum is at 469 nm.
- the photoluminescence quantum yield (PLQY) is 81%, the full width at half maximum is 0.46 eV and the emission lifetime is 14.8 ⁇ s.
- the resulting CIE x coordinate is determined at 0.18 and the CIE y coordinate at 0.27.
- Example 1 was tested in an OLED-device D1 with the following layer structure: Layer Thickness D1 9 100 nm Al 8 2 nm Liq 7 20 nm NBPhen 6 10 nm T2T 5 50 nm mCBP (80%) Example 1 (20 %) 4 10 nm mCBP 3 10 nm TCTA 2 100 nm NPB 1 130 nm ITO Substrate glass
- Example 3 was tested in an OLED-device D2 with the following layer structure: Layer Thickness D2 8 100 nm Al 7 2 nm Liq 6 30 nm NBPhen 5 50 nm mCBP (80%) Example 3 (20 %) 4 10 nm mCBP 3 10 nm TCTA 2 100 nm NPB 1 130 nm ITO Substrate glass
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Abstract
Description
- The invention relates to organic molecules and their use in organic light-emitting diodes (OLEDs) and in other optoelectronic devices.
- The object of the present invention is to provide molecules which are suitable for use in optoelectronic devices.
- This object is achieved by the invention which provides a new class of organic molecules.
- According to the invention, the organic molecules are purely organic molecules, i.e. they do not contain any metal ions in contrast to metal complexes known for use in optoelectronic devices.
- According to the present invention, the organic molecules exhibit emission maxima in the blue, sky-blue or green spectral range. The organic molecules exhibit in particular emission maxima between 420 nm and 520 nm, preferably between 440 nm and 495 nm, more preferably between 450 nm and 470 nm. The photoluminescence quantum yields of the organic molecules according to the invention are, in particular, 70 % or more. The molecules according to the invention exhibit in particular thermally activated delayed fluorescence (TADF). The use of the molecules according to the invention in an optoelectronic device, for example an organic light-emitting diode (OLED), leads to higher efficiencies of the device. Corresponding OLEDs have a higher stability than OLEDs with known emitter materials and comparable color.
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- two second chemical moieties, each independently from another comprising or consisting of a structure of Formula II,
- wherein the first chemical moiety is linked to each of the two second chemical moieties via a single bond.
- T is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties, or is hydrogen.
- V is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties, or is hydrogen.
- W is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties, or is selected from the group consisting of hydrogen, CN and CF3.
- X is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is selected from the group consisting of hydrogen, CN and CF3.
- Y is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is selected from the group consisting of hydrogen, CN and CF3.
- # represents the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties.
- Z is at each occurrence independently from another selected from the group consisting of a direct bond, CR3R4, C=CR3R4, C=O, C=NR3, NR3, O, SiR3R4, S, S(O) and S(O)2.
- R1 is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium,
C1-C5-alkyl,- wherein one or more hydrogen atoms are optionally substituted by deuterium; C2-C8-alkenyl,
- wherein one or more hydrogen atoms are optionally substituted by deuterium; C2-C8-alkynyl,
- wherein one or more hydrogen atoms are optionally substituted by deuterium; and C6-C18-aryl,
- which is optionally substituted with one or more substituents R6.
- R2 is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium,
C1-C5-alkyl,- wherein one or more hydrogen atoms are optionally substituted by deuterium; C2-C8-alkenyl,
- wherein one or more hydrogen atoms are optionally substituted by deuterium; C2-C8-alkynyl,
- wherein one or more hydrogen atoms are optionally substituted by deuterium; and C6-C18-aryl,
- which is optionally substituted with one or more substituents R6.
- Ra, R3 and R4 is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium, N(R5)2, OR5, Si(R5)3, B(OR5)2, OSO2R5, CF3, CN, F, Br, I, C1-C40-alkyl,
- which is optionally substituted with one or more substituents R5 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
- which is optionally substituted with one or more substituents R5 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
- which is optionally substituted with one or more substituents R5 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
- which is optionally substituted with one or more substituents R5 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
- which is optionally substituted with one or more substituents R5 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
which is optionally substituted with one or more substituents R5; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R5. - R5 is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium, N(R6)2, OR6, Si(R6)3, B(OR6)2, OSO2R6, CF3, CN, F, Br, I,
C1-C40-alkyl,- which is optionally substituted with one or more substituents R6 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;
- which is optionally substituted with one or more substituents R6 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;
- which is optionally substituted with one or more substituents R6 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;
- which is optionally substituted with one or more substituents R6 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;
- which is optionally substituted with one or more substituents R6 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;
which is optionally substituted with one or more substituents R6; and
C3-C57-h eteroaryl,
which is optionally substituted with one or more substituents R6. - R6 is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium, OPh,CF3, CN, F,
C1-C5-alkyl,
wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF3, or F;
C1-C5-alkoxy,
wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF3, or F;
C1-C5-thioalkoxy,
wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF3, or F;
C2-C5-alkenyl,
wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF3, or F;
C2-C5-alkynyl,
wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF3, or F;
C6-C18-aryl,- which is optionally substituted with one or more C1-C5-alkyl substituents; C3-C17-heteroaryl,
- which is optionally substituted with one or more C1-C5-alkyl substituents; N(C6-C18-aryl)2;
- N(C3-C17-heteroaryl)2; and
- N(C3-C17-heteroaryl)(C6-C18-aryl).
- The substituents Ra, R3, R4 or R5 independently from each other can optionally form a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system with one or more substituents Ra, R3, R4 or R5.
- According to the invention exactly one substituent selected from the group consisting of W, X, and Y is CN or CF3, and exactly two substituents selected from the group consisting of T, V, W, X and Y represent the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties.
- In one embodiment, R1 and R2 is at each occurrence independently from another selected from the group consisting of H, methyl and phenyl.
- In one embodiment, W is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties, or is selected from the group consisting of CN and CF3.
- In one embodiment of the invention, W is CN.
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- In a further embodiment of the invention, Ra is at each occurrence independently from another selected from the group consisting of H, Me, iPr, tBu, CN, CF3,
Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
and N(Ph)2. - In a further embodiment of the invention, Ra is at each occurrence independently from another selected from the group consisting of H, Me, iPr, tBu, CN, CF3,
Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph, and
triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph. - In a further embodiment of the invention, Ra is at each occurrence independently from another selected from the group consisting of H, Me, tBu,
Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph. - In a further embodiment of the invention, Ra is H at each occurrence.
-
- Rb is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium, N(R5)2, OR5, Si(R5)3, B(OR5)2, OSO2R5, CF3, CN, F, Br, I,
C1-C40-alkyl,- which is optionally substituted with one or more substituents R5 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
- which is optionally substituted with one or more substituents R5 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
- which is optionally substituted with one or more substituents R5 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
- which is optionally substituted with one or more substituents R5 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
- which is optionally substituted with one or more substituents R5 and
- wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
which is optionally substituted with one or more substituents R5; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R5. - In one additional embodiment of the invention, the two second chemical moieties each at each occurrence independently from another comprise or consist of a structure of Formula IIc, a structure of Formula IIc-2, a structure of Formula IIc-3 or a structure of Formula IIc-4:
- In a further embodiment of the invention, Rb is at each occurrence independently from another selected from the group consisting of
Me, iPr, tBu, CN, CF3,
Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
and N(Ph)2. - In a further embodiment of the invention, Rb is at each occurrence independently from another selected from the group consisting of
Me, iPr, tBu, CN, CF3,
Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph, and
triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph. - In a further embodiment of the invention, Rb is at each occurrence independently from another selected from the group consisting of
Me, tBu,
Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph. -
- In one embodiment, Ra and R5 is at each occurrence independently from another selected from the group consisting of hydrogen (H), methyl (Me), i-propyl (CH(CH3)2) (iPr), t-butyl (tBu), phenyl (Ph), CN, CF3, and diphenylamine (NPh2).
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- Rc is at each occurrence independently from another selected from the group consisting of Me,
iPr,
tBu, - Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- and N(Ph)2.
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- In one embodiment of the invention, Rc is at each occurrence independently from another selected from the group consisting of
Me, iPr, tBu, CN, CF3,
Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph, and
triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph. - In one embodiment of the invention Rc is at each occurrence independently from another selected from the group consisting of
Me, tBu,
Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph; and
triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph. - As used throughout the present application, the terms "aryl" and "aromatic" may be understood in the broadest sense as any mono-, bi- or polycyclic aromatic moieties. Accordingly, an aryl group contains 6 to 60 aromatic ring atoms, and a heteroaryl group contains 5 to 60 aromatic ring atoms, of which at least one is a heteroatom. Notwithstanding, throughout the application the number of aromatic ring atoms may be given as subscripted number in the definition of certain substituents. In particular, the heteroaromatic ring includes one to three heteroatoms. Again, the terms "heteroaryl" and "heteroaromatic" may be understood in the broadest sense as any mono-, bi- or polycyclic hetero-aromatic moieties that include at least one heteroatom. The heteroatoms may at each occurrence be the same or different and be individually selected from the group consisting of N, O and S. Accordingly, the term "arylene" refers to a divalent substituent that bears two binding sites to other molecular structures and thereby serving as a linker structure. In case, a group in the exemplary embodiments is defined differently from the definitions given here, for example, the number of aromatic ring atoms or number of heteroatoms differs from the given definition, the definition in the exemplary embodiments is to be applied. According to the invention, a condensed (annulated) aromatic or heteroaromatic polycycle is built of two or more single aromatic or heteroaromatic cycles, which formed the polycycle via a condensation reaction.
- In particular, as used throughout the present application the term aryl group or heteroaryl group comprises groups which can be bound via any position of the aromatic or heteroaromatic group, derived from benzene, naphthaline, anthracene, phenanthrene, pyrene, dihydropyrene, chrysene, perylene, fluoranthene, benzanthracene, benzphenanthrene, tetracene, pentacene, benzpyrene, furan, benzofuran, isobenzofuran, dibenzofuran, thiophene, benzothiophene, isobenzothiophene, dibenzothiophene; pyrrole, indole, isoindole, carbazole, pyridine, quinoline, isoquinoline, acridine, phenanthridine, benzo-5,6-quinoline, benzo-6,7-quinoline, benzo-7,8-quinoline, phenothiazine, phenoxazine, pyrazole, indazole, imidazole, benzimidazole, naphthoimidazole, phenanthroimidazole, pyridoimidazole, pyrazinoimidazole, quinoxalinoimidazole, oxazole, benzoxazole, napthooxazole, anthroxazol, phenanthroxazol, isoxazole, 1,2-thiazole, 1,3-thiazole, benzothiazole, pyridazine, benzopyridazine, pyrimidine, benzopyrimidine, 1,3,5-triazine, quinoxaline, pyrazine, phenazine, naphthyridine, carboline, benzocarboline, phenanthroline, 1,2,3-triazole, 1,2,4-triazole, benzotriazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,2,3,4-tetrazine, purine, pteridine, indolizine und benzothiadiazole or combinations of the abovementioned groups.
- As used throughout the present application the term cyclic group may be understood in the broadest sense as any mono-, bi- or polycyclic moieties.
- As used throughout the present application the term alkyl group may be understood in the broadest sense as any linear, branched, or cyclic alkyl substituent. In particular, the term alkyl comprises the substituents methyl (Me), ethyl (Et), n-propyl (nPr), i-propyl (iPr), cyclopropyl, n-butyl (nBu), i-butyl (iBu), s-butyl (sBu), t-butyl(tBu), cyclobutyl, 2-methylbutyl, n-pentyl, s-pentyl, t-pentyl, 2-pentyl, neo-pentyl, cyclopentyl, n-hexyl, s-hexyl, t-hexyl, 2-hexyl, 3-hexyl, neo-hexyl, cyclohexyl, 1-methylcyclopentyl, 2-methylpentyl, n-heptyl, 2-heptyl, 3-heptyl, 4-heptyl, cycloheptyl, 1-methylcyclohexyl, n-octyl, 2-ethylhexyl, cyclooctyl, 1-bicyclo[2,2,2]octyl, 2-bicyclo[2,2,2]-octyl, 2-(2,6-dimethyl)octyl, 3-(3,7-dimethyl)octyl, adamantyl, 2,2,2-trifluorethyl, 1,1-dimethyl-n-hex-1-yl, 1,1-dimethyl-n-hept-1-yl, 1,1-dimethyl-n-oct-1-yl, 1,1-dimethyl-n-dec-1-yl, 1,1-dimethyl-n-dodec-1-yl, 1,1-dimethyl-n-tetradec-1-yl, 1,1-dimethyl-n-hexadec-1-yl, 1,1-dimethyl-n-octadec-1-yl, 1,1-diethyl-n-hex-1-yl, 1,1-diethyl-n-hept-1-yl, 1,1-diethyl-n-oct-1-yl, 1,1-diethyl-n-dec-1-yl, 1,1-diethyl-n-dodec-1-yl, 1,1-diethyl-n-tetradec-1-yl, 1,1-diethyln-n-hexadec-1-yl, 1,1-diethyl-n-octadec-1-yl, 1-(n-propyl)-cyclohex-1-yl, 1-(n-butyl)-cyclohex-1-yl, 1-(n-hexyl)-cyclohex-1-yl, 1-(n-octyl)-cyclohex-1-yl und 1-(n-decyl)-cyclohex-1-yl.
- As used throughout the present application the term alkenyl comprises linear, branched, and cyclic alkenyl substituents. The term alkenyl group exemplarily comprises the substituents ethenyl, propenyl, butenyl, pentenyl, cyclopentenyl, hexenyl, cyclohexenyl, heptenyl, cycloheptenyl, octenyl, cyclooctenyl or cyclooctadienyl.
- As used throughout the present application the term alkynyl comprises linear, branched, and cyclic alkynyl substituents. The term alkynyl group exemplarily comprises ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl or octynyl.
- As used throughout the present application the term alkoxy comprises linear, branched, and cyclic alkoxy substituents. The term alkoxy group exemplarily comprises methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy, s-butoxy, t-butoxy and 2-methylbutoxy.
- As used throughout the present application the term thioalkoxy comprises linear, branched, and cyclic thioalkoxy substituents, in which the O of the exemplarily alkoxy groups is replaced by S.
- As used throughout the present application, the terms "halogen" and "halo" may be understood in the broadest sense as being preferably fluorine, chlorine, bromine or iodine.
- Whenever hydrogen is mentioned herein, it could also be replaced by deuterium at each occurrence.
- It is understood that when a molecular fragment is described as being a substituent or otherwise attached to another moiety, its name may be written as if it were a fragment (e.g. naphtyl, dibenzofuryl) or as if it were the whole molecule (e.g. naphthalene, dibenzofuran). As used herein, these different ways of designating a substituent or attached fragment are considered to be equivalent.
- In one embodiment, the organic molecules according to the invention have an excited state lifetime of not more than 150 µs, of not more than 100 µs, in particular of not more than 50 µs, more preferably of not more than 10 µs or not more than 7 µs in a film of poly(methyl methacrylate) (PMMA) with 10% by weight of organic molecule at room temperature.
- In one embodiment of the invention, the organic molecules according to the invention represent thermally-activated delayed fluorescence (TADF) emitters, which exhibit a ΔEST value, which corresponds to the energy difference between the first excited singlet state (S1) and the first excited triplet state (T1), of less than 5000 cm-1, preferably less than 3000 cm-1, more preferably less than 1500 cm-1, even more preferably less than 1000 cm-1 or even less than 500 cm-1.
- In a further embodiment of the invention, the organic molecules according to the invention have an emission peak in the visible or nearest ultraviolet range, i.e., in the range of a wavelength of from 380 to 800 nm, with a full width at half maximum of less than 0.50 eV, preferably less than 0.48 eV, more preferably less than 0.45 eV, even more preferably less than 0.43 eV or even less than 0.40 eV in a film of poly(methyl methacrylate) (PMMA) with 10% by weight of organic molecule at room temperature.
- In a further embodiment of the invention, the organic molecules according to the invention have a "blue material index" (BMI), calculated by dividing the photoluminescence quantum yield (PLQY) in % by the CIEy color coordinate of the emitted light, of more than 150, in particular more than 200, preferably more than 250, more preferably of more than 300 or even more than 500.
- Orbital and excited state energies can be determined either by means of experimental methods or by calculations employing quantum-chemical methods, in particular density functional theory calculations. The energy of the highest occupied molecular orbital EHOMO is determined by methods known to the person skilled in the art from cyclic voltammetry measurements with an accuracy of 0.1 eV. The energy of the lowest unoccupied molecular orbital ELUMO is calculated as EHOMO + Egap, wherein Egap is determined as follows: For host compounds, the onset of the emission spectrum of a film with 10% by weight of host in poly(methyl methacrylate) (PMMA) is used as Egap, unless stated otherwise. For emitter molecules, Egap is determined as the energy at which the excitation and emission spectra of a film with 10% by weight of emitter in PMMA cross.
- The energy of the first excited triplet state T1 is determined from the onset of the emission spectrum at low temperature, typically at 77 K. For host compounds, where the first excited singlet state and the lowest triplet state are energetically separated by > 0.4 eV, the phosphorescence is usually visible in a steady-state spectrum in 2-Me-THF. The triplet energy can thus be determined as the onset of the phosphorescence spectrum. For TADF emitter molecules, the energy of the first excited triplet state T1 is determined from the onset of the delayed emission spectrum at 77 K, if not otherwise stated measured in a film of) PMMA with 10% by weight of emitter. Both for host and emitter compounds, the energy of the first excited singlet state S1 is determined from the onset of the emission spectrum, if not otherwise stated measured in a film of PMMA with 10% by weight of host or emitter compound. The onset of an emission spectrum is determined by computing the intersection of the tangent to the emission spectrum with the x-axis. The tangent to the emission spectrum is set at the high-energy side of the emission band, i.e., where the emission band rises by going from higher energy values to lower energy values, and at the point at half maximum of the maximum intensity of the emission spectrum.
-
- According to the invention, in the reaction for the synthesis of E1 a boronic acid can be used instead of a boronic acid ester.
- For the reaction of a nitrogen heterocycle in a nucleophilic aromatic substitution with an aryl halide, preferably an aryl fluoride, typical conditions include the use of a base, such as tribasic potassium phosphate or sodium hydride, for example, in an aprotic polar solvent, such as dimethyl sulfoxide (DMSO) or N,N-dimethylformamide (DMF), for example.
- An alternative synthesis route comprises the introduction of a nitrogen heterocycle via copper- or palladium-catalyzed coupling to an aryl halide or aryl pseudohalide, preferably an aryl bromide, an aryl iodide, aryl triflate or an aryl tosylate.
- A further aspect of the invention relates to the use of an organic molecule according to the invention as a luminescent emitter or as an absorber, and/or as host material and/or as electron transport material, and/or as hole injection material, and/or as hole blocking material in an optoelectronic device.
- The organic electroluminescent device may be understood in the broadest sense as any device based on organic materials that is suitable for emitting light in the visible or nearest ultraviolet (UV) range, i.e., in the range of a wavelength of from 380 to 800 nm. More preferably, organic electroluminescent device may be able to emit light in the visible range, i.e., of from 400 to 800 nm.
- In the context of such use, the optoelectronic device is more particularly selected from the group consisting of:
- organic light-emitting diodes (OLEDs),
- light-emitting electrochemical cells,
- OLED sensors, especially in gas and vapour sensors not hermetically externally shielded,
- organic diodes,
- organic solar cells,
- organic transistors,
- organic field-effect transistors,
- organic lasers and
- down-conversion elements.
- In a preferred embodiment in the context of such use, the organic electroluminescent device is a device selected from the group consisting of an organic light emitting diode (OLED), a light emitting electrochemical cell (LEC), and a light-emitting transistor.
- In the case of the use, the fraction of the organic molecule according to the invention in the emission layer in an optoelectronic device, more particularly in OLEDs, is 1 % to 99 % by weight, more particularly 5 % to 80 % by weight. In an alternative embodiment, the proportion of the organic molecule in the emission layer is 100 % by weight.
- In one embodiment, the light-emitting layer comprises not only the organic molecules according to the invention but also a host material whose triplet (T1) and singlet (S1) energy levels are energetically higher than the triplet (T1) and singlet (S1) energy levels of the organic molecule.
- A further aspect of the invention relates to a composition comprising or consisting of:
- (a) at least one organic molecule according to the invention, in particular in the form of an emitter and/or a host, and
- (b) one or more emitter and/or host materials, which differ from the organic molecule according to the invention and
- (c) optional one or more dyes and/or one or more solvents.
- In one embodiment, the light-emitting layer comprises (or (essentially) consists of) a composition comprising or consisting of:
- (a) at least one organic molecule according to the invention, in particular in the form of an emitter and/or a host, and
- (b) one or more emitter and/or host materials, which differ from the organic molecule according to the invention and
- (c) optional one or more dyes and/or one or more solvents.
- Particularly preferably the light-emitting layer EML comprises (or (essentially) consists of) a composition comprising or consisting of:
- (i) 1-50 % by weight, preferably 5-40 % by weight, in particular 10-30 % by weight, of one or more organic molecules according to the invention;
- (ii) 5-99 % by weight, preferably 30-94.9 % by weight, in particular 40-89% by weight, of at least one host compound H; and
- (iii) optionally 0-94 % by weight, preferably 0.1-65 % by weight, in particular 1-50 % by weight, of at least one further host compound D with a structure differing from the structure of the molecules according to the invention; and
- (iv) optionally 0-94 % by weight, preferably 0-65 % by weight, in particular 0-50 % by weight, of a solvent; and
- (v) optionally 0-30 % by weight, in particular 0-20 % by weight, preferably 0-5 % by weight, of at least one further emitter molecule F with a structure differing from the structure of the molecules according to the invention.
- Preferably, energy can be transferred from the host compound H to the one or more organic molecules according to the invention, in particular transferred from the first excited triplet state T1(H) of the host compound H to the first excited triplet state T1(E) of the one or more organic molecules according to the invention and/ or from the first excited singlet state S1(H) of the host compound H to the first excited singlet state S1(E) of the one or more organic molecules according to the invention.
- In a further embodiment, the light-emitting layer EML comprises (or (essentially) consists of) a composition comprising or consisting of:
- (i) 1-50 % by weight, preferably 5-40 % by weight, in particular 10-30 % by weight, of one organic molecule according to the invention;
- (ii) 5-99 % by weight, preferably 30-94.9 % by weight, in particular 40-89% by weight, of one host compound H; and
- (iii) optionally 0-94 % by weight, preferably 0.1-65 % by weight, in particular 1-50 % by weight, of at least one further host compound D with a structure differing from the structure of the molecules according to the invention; and
- (iv) optionally 0-94 % by weight, preferably 0-65 % by weight, in particular 0-50 % by weight, of a solvent; and
- (v) optionally 0-30 % by weight, in particular 0-20 % by weight, preferably 0-5 % by weight, of at least one further emitter molecule F with a structure differing from the structure of the molecules according to the invention.
- In one embodiment, the host compound H has a highest occupied molecular orbital HOMO(H) having an energy EHOMO(H) in the range of from -5 to -6.5 eV and the at least one further host compound D has a highest occupied molecular orbital HOMO(D) having an energy EHOMO(D), wherein EHOMO(H) > EHOMO(D).
- In a further embodiment, the host compound H has a lowest unoccupied molecular orbital LUMO(H) having an energy ELUMO(H) and the at least one further host compound D has a lowest unoccupied molecular orbital LUMO(D) having an energy ELUMO(D), wherein ELUMO(H) > ELUMO(D).
- In one embodiment, the host compound H has a highest occupied molecular orbital HOMO(H) having an energy EHOMO(H) and a lowest unoccupied molecular orbital LUMO(H) having an energy ELUMO(H), and
- the at least one further host compound D has a highest occupied molecular orbital HOMO(D) having an energy EHOMO(D) and a lowest unoccupied molecular orbital LUMO(D) having an energy ELUMO(D),
- the organic molecule according to the invention has a highest occupied molecular orbital HOMO(E) having an energy EHOMO(E) and a lowest unoccupied molecular orbital LUMO(E) having an energy ELUMO(E),
- In a further aspect, the invention relates to an optoelectronic device comprising an organic molecule or a composition of the type described here, more particularly in the form of a device selected from the group consisting of organic light-emitting diode (OLED), light-emitting electrochemical cell, OLED sensor, more particularly gas and vapour sensors not hermetically externally shielded, organic diode, organic solar cell, organic transistor, organic field-effect transistor, organic laser and down-conversion element.
- In a preferred embodiment, the organic electroluminescent device is a device selected from the group consisting of an organic light emitting diode (OLED), a light emitting electrochemical cell (LEC), and a light-emitting transistor.
- In one embodiment of the optoelectronic device of the invention, the organic molecule according to the invention is used as emission material in a light-emitting layer EML.
- In one embodiment of the optoelectronic device of the invention the light-emitting layer EML consists of the composition according to the invention described here.
- Exemplarily, when the organic electroluminescent device is an OLED, it may exhibit the following layer structure:
- 1. substrate
- 2. anode layer A
- 3. hole injection layer, HIL
- 4. hole transport layer, HTL
- 5. electron blocking layer, EBL
- 6. emitting layer, EML
- 7. hole blocking layer, HBL
- 8. electron transport layer, ETL
- 9. electron injection layer, EIL
- 10. cathode layer,
- Furthermore, the organic electroluminescent device may optionally comprise one or more protective layers protecting the device from damaging exposure to harmful species in the environment including, exemplarily moisture, vapor and/or gases.
- In one embodiment of the invention, the organic electroluminescent device is an OLED, which exhibits the following inverted layer structure:
- 1. substrate
- 2. cathode layer
- 3. electron injection layer, EIL
- 4. electron transport layer, ETL
- 5. hole blocking layer, HBL
- 6. emitting layer, B
- 7. electron blocking layer, EBL
- 8. hole transport layer, HTL
- 9. hole injection layer, HIL
- 10. anode layer A
- Wherein the OLED with an inverted layer structure comprises each layer only optionally, different layers may be merged and the OLED may comprise more than one layer of each layer types defined above.
- In one embodiment of the invention, the organic electroluminescent device is an OLED, which may exhibit stacked architecture. In this architecture, contrary to the typical arrangement, where the OLEDs are placed side by side, the individual units are stacked on top of each other. Blended light may be generated with OLEDs exhibiting a stacked architecture, in particular white light may be generated by stacking blue, green and red OLEDs. Furthermore, the OLED exhibiting a stacked architecture may optionally comprise a charge generation layer (CGL), which is typically located between two OLED subunits and typically consists of a n-doped and p-doped layer with the n-doped layer of one CGL being typically located closer to the anode layer.
- In one embodiment of the invention, the organic electroluminescent device is an OLED, which comprises two or more emission layers between anode and cathode. In particular, this so-called tandem OLED comprises three emission layers, wherein one emission layer emits red light, one emission layer emits green light and one emission layer emits blue light, and optionally may comprise further layers such as charge generation layers, blocking or transporting layers between the individual emission layers. In a further embodiment, the emission layers are adjacently stacked. In a further embodiment, the tandem OLED comprises a charge generation layer between each two emission layers. In addition, adjacent emission layers or emission layers separated by a charge generation layer may be merged.
- The substrate may be formed by any material or composition of materials. Most frequently, glass slides are used as substrates. Alternatively, thin metal layers (e.g., copper, gold, silver or aluminum films) or plastic films or slides may be used. This may allow a higher degree of flexibility. The anode layer A is mostly composed of materials allowing to obtain an (essentially) transparent film. As at least one of both electrodes should be (essentially) transparent in order to allow light emission from the OLED, either the anode layer A or the cathode layer C is transparent. Preferably, the anode layer A comprises a large content or even consists of transparent conductive oxides (TCOs). Such anode layer A may exemplarily comprise indium tin oxide, aluminum zinc oxide, fluorine doped tin oxide, indium zinc oxide, PbO, SnO, zirconium oxide, molybdenum oxide, vanadium oxide, wolfram oxide, graphite, doped Si, doped Ge, doped GaAs, doped polyaniline, doped polypyrrol and/or doped polythiophene.
- Particularly preferably, the anode layer A (essentially) consists of indium tin oxide (ITO) (e.g., (InO3)0.9(SnO2)0.1). The roughness of the anode layer A caused by the transparent conductive oxides (TCOs) may be compensated by using a hole injection layer (HIL). Further, the HIL may facilitate the injection of quasi charge carriers (i.e., holes) in that the transport of the quasi charge carriers from the TCO to the hole transport layer (HTL) is facilitated. The hole injection layer (HIL) may comprise poly-3,4-ethylendioxy thiophene (PEDOT), polystyrene sulfonate (PSS), MoO2, V2O5, CuPC or Cul, in particular a mixture of PEDOT and PSS. The hole injection layer (HIL) may also prevent the diffusion of metals from the anode layer A into the hole transport layer (HTL). The HIL may exemplarily comprise PEDOT:PSS (poly-3,4-ethylendioxy thiophene: polystyrene sulfonate), PEDOT (poly-3,4-ethylendioxy thiophene), mMTDATA (4,4',4"-tris[phenyl(m-tolyl)amino]triphenylamine), Spiro-TAD (2,2',7,7'-tetrakis(n,n-diphenylamino)-9,9'-spirobifluorene), DNTPD (N1,N1'-(biphenyl-4,4'-diyl)bis(N1-phenyl-N4,N4-di-m-tolylbenzene-1,4-diamine), NPB (N,N'-nis-(1-naphthalenyl)-N,N'-bisphenyl-(1,1'-biphenyl)-4,4'-diamine), NPNPB (N,N'-diphenyl-N,N'-di-[4-(N,N-diphenyl-amino)phenyl]benzidine), MeO-TPD (N,N,N',N'-tetrakis(4-methoxyphenyl)benzidine), HAT-CN (1,4,5,8,9,11-hexaazatriphenylen-hexacarbonitrile) and/or Spiro-NPD (N,N'-diphenyl-N,N'-bis-(1-naphthyl)-9,9'-spirobifluorene-2,7-diamine).
- Adjacent to the anode layer A or hole injection layer (HIL) typically a hole transport layer (HTL) is located. Herein, any hole transport compound may be used. Exemplarily, electron-rich heteroaromatic compounds such as triarylamines and/or carbazoles may be used as hole transport compound. The HTL may decrease the energy barrier between the anode layer A and the light-emitting layer EML. The hole transport layer (HTL) may also be an electron blocking layer (EBL). Preferably, hole transport compounds bear comparably high energy levels of their triplet states T1. Exemplarily the hole transport layer (HTL) may comprise a star-shaped heterocycle such as tris(4-carbazoyl-9-ylphenyl)amine (TCTA), poly-TPD (poly(4-butylphenyl-diphenyl-amine)), [alpha]-NPD (poly(4-butylphenyl-diphenyl-amine)), TAPC (4,4'-cyclohexyliden-bis[N,N-bis(4-methylphenyl)benzenamine]), 2-TNATA (4,4',4"-tris[2-naphthyl(phenyl)amino]triphenylamine), Spiro-TAD, DNTPD, NPB, NPNPB, MeO-TPD, HAT-CN and/or TrisPcz (9,9'-diphenyl-6-(9-phenyl-9H-carbazol-3-yl)-9H,9'H-3,3'-bicarbazole). In addition, the HTL may comprise a p-doped layer, which may be composed of an inorganic or organic dopant in an organic hole-transporting matrix. Transition metal oxides such as vanadium oxide, molybdenum oxide or tungsten oxide may exemplarily be used as inorganic dopant. Tetrafluorotetracyanoquinodimethane (F4-TCNQ), copper-pentafluorobenzoate (Cu(I)pFBz) or transition metal complexes may exemplarily be used as organic dopant.
- The EBL may exemplarily comprise mCP (1,3-bis(carbazol-9-yl)benzene), TCTA, 2-TNATA, mCBP (3,3-di(9H-carbazol-9-yl)biphenyl), tris-Pcz, CzSi (9-(4-tert-Butylphenyl)-3,6-bis(triphenylsilyl)-9H-carbazole), and/or DCB (N,N'-dicarbazolyl-1,4-dimethylbenzene).
- Adjacent to the hole transport layer (HTL), typically, the light-emitting layer EML is located. The light-emitting layer EML comprises at least one light emitting molecule. Particular, the EML comprises at least one light emitting molecule according to the invention. In one embodiment, the light-emitting layer comprises only the organic molecules according to the invention. Typically, the EML additionally comprises one or more host material. Exemplarily, the host material is selected from CBP (4,4'-Bis-(N-carbazolyl)-biphenyl), mCP, mCBP Sif87 (dibenzo[b,d]thiophen-2-yltriphenylsilane), CzSi, Sif88 (dibenzo[b,d]thiophen-2-yl)diphenylsilane), DPEPO (bis[2-(diphenylphosphino)phenyl] ether oxide), 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H-carbazole, T2T (2,4,6-tris(biphenyl-3-yl)-1,3,5-triazine), T3T (2,4,6-tris(triphenyl-3-yl)-1,3,5-triazine) and/or TST (2,4,6-tris(9,9'-spirobifluorene-2-yl)-1,3,5-triazine). The host material typically should be selected to exhibit first triplet (T1) and first singlet (S1) energy levels, which are energetically higher than the first triplet (T1) and first singlet (S1) energy levels of the organic molecule.
- In one embodiment of the invention, the EML comprises a so-called mixed-host system with at least one hole-dominant host and one electron-dominant host. In a particular embodiment, the EML comprises exactly one light emitting molecule according to the invention and a mixed-host system comprising T2T as electron-dominant host and a host selected from CBP, mCP, mCBP, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole and 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H-carbazole as hole-dominant host. In a further embodiment the EML comprises 50-80 % by weight, preferably 60-75 % by weight of a host selected from CBP, mCP, mCBP, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole and 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H-carbazole; 10-45 % by weight, preferably 15-30 % by weight of T2T and 5-40 % by weight, preferably 10-30 % by weight of light emitting molecule according to the invention.
- Adjacent to the light-emitting layer EML an electron transport layer (ETL) may be located. Herein, any electron transporter may be used. Exemplarily, compounds poor of electrons such as, e.g., benzimidazoles, pyridines, triazoles, oxadiazoles (e.g., 1,3,4-oxadiazole), phosphinoxides and sulfone, may be used. An electron transporter may also be a star-shaped heterocycle such as 1,3,5-tri(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl (TPBi). The ETL may comprise NBphen (2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline), Alq3 (Aluminum-tris(8-hydroxyquinoline)), TSPO1 (diphenyl-4-triphenylsilylphenyl-phosphinoxide), BPyTP2 (2,7-di(2,2'-bipyridin-5-yl)triphenyle), Sif87 (dibenzo[b,d]thiophen-2-yltriphenylsilane), Sif88 (dibenzo[b,d]thiophen-2-yl)diphenylsilane), BmPyPhB (1,3-bis[3,5-di(pyridin-3-yl)phenyl]benzene) and/or BTB (4,4'-bis-[2-(4,6-diphenyl-1,3,5-triazinyl)]-1,1'-biphenyl). Optionally, the ETL may be doped with materials such as Liq. The electron transport layer (ETL) may also block holes or a holeblocking layer (HBL) is introduced.
The HBL may exemplarily comprise BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline = Bathocuproine), BAlq (bis(8-hydroxy-2-methylquinoline)-(4-phenylphenoxy)aluminum), NBphen (2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline), Alq3 (Aluminum-tris(8-hydroxyquinoline)), TSPO1 (diphenyl-4-triphenylsilylphenyl-phosphinoxide), T2T (2,4,6-tris(biphenyl-3-yl)-1,3,5-triazine), T3T (2,4,6-tris(triphenyl-3-yl)-1,3,5-triazine), TST (2,4,6-tris(9,9'-spirobifluorene-2-yl)-1,3,5-triazine), and/or TCB/TCP (1,3,5-tris(N-carbazolyl)benzol/ 1,3,5-tris(carbazol)-9-yl)benzene). - Adjacent to the electron transport layer (ETL), a cathode layer C may be located. Exemplarily, the cathode layer C may comprise or may consist of a metal (e.g., Al, Au, Ag, Pt, Cu, Zn, Ni, Fe, Pb, LiF, Ca, Ba, Mg, In, W, or Pd) or a metal alloy. For practical reasons, the cathode layer may also consist of (essentially) intransparent metals such as Mg, Ca, or Al. Alternatively or additionally, the cathode layer C may also comprise graphite and or carbon nanotubes (CNTs). Alternatively, the cathode layer C may also consist of nanoscalic silver wires.
- An OLED may further, optionally, comprise a protection layer between the electron transport layer (ETL) and the cathode layer C (which may be designated as electron injection layer (EIL)). This layer may comprise lithium fluoride, cesium fluoride, silver, Liq (8-hydroxyquinolinolatolithium), Li2O, BaF2, MgO, and/or NaF.
- Optionally, also the electron transport layer (ETL) and/or a hole blocking layer (HBL) may comprise one or more host compounds.
- In order to modify the emission spectrum and/or the absorption spectrum of the light-emitting layer EML further, the light-emitting layer EML may further comprise one or more further emitter molecule F. Such an emitter molecule F may be any emitter molecule known in the art. Preferably such an emitter molecule F is a molecule with a structure differing from the structure of the molecules according to the invention. The emitter molecule F may optionally be a TADF emitter. Alternatively, the emitter molecule F may optionally be a fluorescent and/or phosphorescent emitter molecule which is able to shift the emission spectrum and/or the absorption spectrum of the light-emitting layer EML. Exemplarily, the triplet and/or singlet excitons may be transferred from the emitter molecule according to the invention to the emitter molecule F before relaxing to the ground state S0 by emitting light typically red-shifted in comparison to the light emitted by emitter molecule E. Optionally, the emitter molecule F may also provoke two-photon effects (i.e., the absorption of two photons of half the energy of the absorption maximum).
- Optionally, an organic electroluminescent device (e.g., an OLED) may exemplarily be an essentially white organic electroluminescent device. Exemplarily such white organic electroluminescent device may comprise at least one (deep) blue emitter molecule and one or more emitter molecules emitting green and/or red light. Then, there may also optionally be energy transmittance between two or more molecules as described above.
- As used herein, if not defined more specifically in the particular context, the designation of the colors of emitted and/or absorbed light is as follows:
- violet:
- wavelength range of >380-420 nm;
- deep blue:
- wavelength range of >420-480 nm;
- sky blue:
- wavelength range of >480-500 nm;
- green:
- wavelength range of >500-560 nm;
- yellow:
- wavelength range of >560-580 nm;
- orange:
- wavelength range of >580-620 nm;
- red:
- wavelength range of >620-800 nm.
- With respect to emitter molecules, such colors refer to the emission maximum. Therefore, exemplarily, a deep blue emitter has an emission maximum in the range of from >420 to 480 nm, a sky blue emitter has an emission maximum in the range of from >480 to 500 nm, a green emitter has an emission maximum in a range of from >500 to 560 nm, a red emitter has an emission maximum in a range of from >620 to 800 nm.
- A deep blue emitter may preferably have an emission maximum of below 480 nm, more preferably below 470 nm, even more preferably below 465 nm or even below 460 nm. It will typically be above 420 nm, preferably above 430 nm, more preferably above 440 nm or even above 450 nm.
- Accordingly, a further aspect of the present invention relates to an OLED, which exhibits an external quantum efficiency at 1000 cd/m2 of more than 8%, more preferably of more than 10%, more preferably of more than 13%, even more preferably of more than 15% or even more than 20% and/or exhibits an emission maximum between 420 nm and 500 nm, preferably between 430 nm and 490 nm, more preferably between 440 nm and 480 nm, even more preferably between 450 nm and 470 nm and/or exhibits a LT80 value at 500 cd/m2 of more than 100 h, preferably more than 200 h, more preferably more than 400 h, even more preferably more than 750 h or even more than 1000 h. Accordingly, a further aspect of the present invention relates to an OLED, whose emission exhibits a CIEy color coordinate of less than 0.45, preferably less than 0.30, more preferably less than 0.20 or even more preferably less than 0.15 or even less than 0.10.
- A further aspect of the present invention relates to an OLED, which emits light at a distinct color point. According to the present invention, the OLED emits light with a narrow emission band (small full width at half maximum (FWHM)). In one aspect, the OLED according to the invention emits light with a FWHM of the main emission peak of less than 0.50 eV, preferably less than 0.48 eV, more preferably less than 0.45 eV, even more preferably less than 0.43 eV or even less than 0.40 eV.
- A further aspect of the present invention relates to an OLED, which emits light with CIEx and CIEy color coordinates close to the CIEx (= 0.131) and CIEy (= 0.046) color coordinates of the primary color blue (CIEx = 0.131 and CIEy = 0.046) as defined by ITU-R Recommendation BT.2020 (Rec. 2020) and thus is suited for the use in Ultra High Definition (UHD) displays, e.g. UHD-TVs. In commercial applications, typically top-emitting (top-electrode is transparent) devices are used, whereas test devices as used throughout the present application represent bottom-emitting devices (bottom-electrode and substrate are transparent). The CIEy color coordinate of a blue device can be reduced by up to a factor of two, when changing from a bottom- to a top-emitting device, while the CIEx remains nearly unchanged (Okinaka et al. (2015), 22.1: Invited Paper: New Fluorescent Blue Host Materials for Achieving Low Voltage in OLEDs, SID Symposium Digest of Technical Papers, 46; doi:10.1002/sdtp.10480). Accordingly, a further aspect of the present invention relates to an OLED, whose emission exhibits a CIEx color coordinate of between 0.02 and 0.30, preferably between 0.03 and 0.25, more preferably between 0.05 and 0.20 or even more preferably between 0.08 and 0.18 or even between 0.10 and 0.15 and/ or a CIEy color coordinate of between 0.00 and 0.45, preferably between 0.01 and 0.30, more preferably between 0.02 and 0.20 or even more preferably between 0.03 and 0.15 or even between 0.04 and 0.10.
- In a further aspect, the invention relates to a method for producing an optoelectronic component. In this case an organic molecule of the invention is used.
- The organic electroluminescent device, in particular the OLED according to the present invention can be fabricated by any means of vapor deposition and/ or liquid processing. Accordingly, at least one layer is
- prepared by means of a sublimation process,
- prepared by means of an organic vapor phase deposition process,
- prepared by means of a carrier gas sublimation process,
- solution processed or printed.
- The methods used to fabricate the organic electroluminescent device, in particular the OLED according to the present invention are known in the art. The different layers are individually and successively deposited on a suitable substrate by means of subsequent deposition processes. The individual layers may be deposited using the same or differing deposition methods.
- Vapor deposition processes exemplarily comprise thermal (co)evaporation, chemical vapor deposition and physical vapor deposition. For active matrix OLED display, an AMOLED backplane is used as substrate. The individual layer may be processed from solutions or dispersions employing adequate solvents. Solution deposition process exemplarily comprise spin coating, dip coating and jet printing. Liquid processing may optionally be carried out in an inert atmosphere (e.g., in a nitrogen atmosphere) and the solvent may optionally be completely or partially removed by means known in the state of the art.
-
-
- 2-chloro-3-(trifluoromethyl)benzonitrile E2 (1.00 equivalents), 4-cyano/(trifluoromethyl)-3,5-difluoro-boronic acid pinacol ester (1.10 equivalents), Pd2(dba)3 (0.01 equivalent), 2-dicyclohexylphosphino-2',6'-dimethoxybiphenyl (SPhos) (0.04 equivalents) and tribasic potassium phosphate (2.50 equivalents) are stirred under nitrogen atmosphere in a toluene/water mixture (ratio of 10:1, 2 mL toluene/mmol aryl bromide) at 110 °C until completion (usually 2-4 hours). Subsequently the reaction mixture is filtrated and the residue is washed with dichloromethane. The filtrate is added brine and the phases are separated. Subsequently, the organic phase is dried over MgSO4, filtrated and concentrated in vacuo. The crude product obtained is purified by recrystallisation from an appropriate solvent (ethanol, toluene, n-hexane) or by flash chromatography. The product is obtained as solid.
- Instead of a boronic acid ester a corresponding boronic acid may be used.
-
- The synthesis of Z2 is carried out according to AAV1, wherein 2-chloro-3-(trifluoromethyl)benzonitrile E2 reacts with 3-cyano/(trifluoromethyl)-2,4-difluoro-boronic acid pinacol ester.
-
- The synthesis of Z3 is carried out according to AAV1, wherein 2-chloro-3-(trifluoromethyl)benzonitrile E2 reacts with 4-cyano/(trifluoromethyl)-2,6-difluoro-boronic acid pinacol ester.
-
- The synthesis of Z4 is carried out according to AAV1, wherein 2-chloro-3-(trifluoromethyl)benzonitrile E2 reacts with 4-cyano/(trifluoromethyl)-2,5-difluoro-boronic acid pinacol ester.
-
- The synthesis of Z5 is carried out according to AAV1, wherein 2-chloro-3-(trifluoromethyl)benzonitrile E2 reacts with 2-cyano/(trifluoromethyl)-4,5-difluoro-boronic acid pinacol ester.
-
- The synthesis of Z6 is carried out according to AAV1, wherein 2-chloro-3-(trifluoromethyl)benzonitrile E2 reacts with 3-cyano/(trifluoromethyl)-4,5-difluoro-boronic acid pinacol ester.
-
- Z1, Z2, Z3, Z4, Z5 or Z6 (1 equivalent each), the corresponding donor molecule D-H (2.00 equivalents) and tribasic potassium phosphate (4.00 equivalents) are suspended under nitrogen atmosphere in DMSO and stirred at 120 °C (16 h). Subsequently the reaction mixture is poured into a saturated sodium chloride solution and extracted three times with dichloromethane. The combined organic phases are washed twice with saturated sodium chloride solution, dried over MgSO4 and the solvent removed. The crude product is purified by recrystallization out of toluene or by flash chromatography. The product is obtained as a solid.
- In particular, the donor molecule D-H is a 3,6-substituted carbazole (e.g., 3,6-dimethylcarbazole, 3,6-diphenylcarbazole, 3,6-di-tert-butylcarbazole), a 2,7-substituted carbazole (e.g., 2,7-dimethylcarbazole, 2,7-diphenylcarbazole, 2,7-di-tert-butylcarbazole), a 1,8-substituted carbazole (e.g., 1,8-dimethylcarbazole, 1,8-diphenylcarbazole, 1,8-di-tert-butylcarbazole), a 1-substituted carbazole (e.g., 1-methylcarbazole, 1-phenylcarbazole, 1-tert-butylcarbazole), a 2-substituted carbazole (e.g., 2-methylcarbazole, 2-phenylcarbazole, 2-tert-butylcarbazole), or a 3-substituted carbazole (e.g., 3-methylcarbazole, 3-phenylcarbazole, 3-tert-butylcarbazole).
- Exemplarily a halogen-substituted carbazole, particularly 3-bromocarbazole, can be used as D-H.
In a subsequent reaction a boronic acid ester functional group or boronic acid functional group may be exemplarily introduced at the position of the one or more halogen substituents, which was introduced via D-H, to yield the corresponding carbazol-3-ylboronic acid ester or carbazol-3-ylboronic acid, e.g., via the reaction with bis(pinacolato)diboron (CAS No. 73183-34-3). Subsequently, one or more substituents Ra may be introduced in place of the boronic acid ester group or the boronic acid group via a coupling reaction with the corresponding halogenated reactant Ra-Hal, preferably Ra-Cl and Ra-Br.
Alternatively, one or more substituents Ra may be introduced at the position of the one or more halogen substituents, which was introduced via D-H, via the reaction with a boronic acid of the substituent Ra [Ra-B(OH)2] or a corresponding boronic acid ester. - HPLC-MS spectroscopy is performed on a HPLC by Agilent (1100 series) with MS-detector (Thermo LTQ XL). A reverse phase column 4,6mm x 150mm, particle size 5,0µm from Waters (without pre-column) is used in the HPLC. The HPLC-MS measurements are performed at room temperature (rt) with the solvents acetonitrile, water and THF in the following concentrations:
solvent A: H2O (90%) MeCN (10%) solvent B: H2O (10%) MeCN (90%) solvent C: THF (50%) MeCN (50%) - From a solution with a concentration of 0.5mg/ml an injection volume of 15 µL is taken for the measurements. The following gradient is used:
Flow rate [ml/min] time [min] A[%] B[%] C[%] 3 0 40 50 10 3 10 15 25 60 3 14 15 25 60 3 14.01 40 50 10 3 18 40 50 10 3 19 40 50 10 - Cyclic voltammograms are measured from solutions having concentration of 10-3 mol/l of the organic molecules in dichloromethane or a suitable solvent and a suitable supporting electrolyte (e.g. 0.1 mol/l of tetrabutylammonium hexafluorophosphate). The measurements are conducted at room temperature under nitrogen atmosphere with a three-electrode assembly (Working and counter electrodes: Pt wire, reference electrode: Pt wire) and calibrated using FeCp2/FeCp2 + as internal standard. The HOMO data was corrected using ferrocene as internal standard against SCE.
- Molecular structures are optimized employing the BP86 functional and the resolution of identity approach (RI). Excitation energies are calculated using the (BP86) optimized structures employing Time-Dependent DFT (TD-DFT) methods. Orbital and excited state energies are calculated with the B3LYP functional. Def2-SVP basis sets (and a m4-grid for numerical integration are used. The Turbomole program package is used for all calculations.
-
- Sample pretreatment: Spin-coating
- Apparatus: Spin150, SPS euro.
- The sample concentration is 10 mg/ml, dissolved in a suitable solvent.
Program: 1) 3 s at 400 U/min; 20 s at 1000 U/min at 1000 Upm/s. 3) 10 s at 4000 U/min at 1000 Upm/s. After coating, the films are dried at 70 °C for 1 min. - Photoluminescence spectroscopy and TCSPC (Time-correlated single-photon counting) Steady-state emission spectroscopy is measured by a Horiba Scientific, Modell FluoroMax-4 equipped with a 150 W Xenon-Arc lamp, excitation- and emissions monochromators and a Hamamatsu R928 photomultiplier and a time-correlated single-photon counting option. Emissions and excitation spectra are corrected using standard correction fits.
- Excited state lifetimes are determined employing the same system using the TCSPC method with FM-2013 equipment and a Horiba Yvon TCSPC hub.
Excitation sources: - NanoLED 370 (wavelength: 371 nm, puls duration: 1,1 ns)
- NanoLED 290 (wavelength: 294 nm, puls duration: <1 ns)
- SpectraLED 310 (wavelength: 314 nm)
- SpectraLED 355 (wavelength: 355 nm).
- Data analysis (exponential fit) is done using the software suite DataStation and DAS6 analysis software. The fit is specified using the chi-squared-test.
- For photoluminescence quantum yield (PLQY) measurements an Absolute PL Quantum Yield Measurement C9920-03G system (Hamamatsu Photonics) is used. Quantum yields and CIE coordinates are determined using the software U6039-05 version 3.6.0.
- Emission maxima are given in nm, quantum yields Φ in % and CIE coordinates as x,y values. PLQY is determined using the following protocol:
- 1) Quality assurance: Anthracene in ethanol (known concentration) is used as reference
- 2) Excitation wavelength: the absorption maximum of the organic molecule is determined and the molecule is excited using this wavelength
- 3) Measurement
-
- OLED devices comprising organic molecules according to the invention can be produced via vacuum-deposition methods. If a layer contains more than one compound, the weight-percentage of one or more compounds is given in %. The total weight-percentage values amount to 100 %, thus if a value is not given, the fraction of this compound equals to the difference between the given values and 100%.
- The not fully optimized OLEDs are characterized using standard methods and measuring electroluminescence spectra, the external quantum efficiency (in %) in dependency on the intensity, calculated using the light detected by the photodiode, and the current. The OLED device lifetime is extracted from the change of the luminance during operation at constant current density. The LT50 value corresponds to the time, where the measured luminance decreased to 50 % of the initial luminance, analogously LT80 corresponds to the time point, at which the measured luminance decreased to 80 % of the initial luminance, LT 95 to the time point, at which the measured luminance decreased to 95 % of the initial luminance etc.
-
- The values correspond to the average of several pixels (typically two to eight), the standard deviation between these pixels is given. Figures show the data series for one OLED pixel.
-
- Example 1 was synthesized according to AAV1 (81% yield) and AAV7 (43% yield).
MS (HPLC-MS), m/z (retention time): 826.48 (11.17 min). -
Figure 1 depicts the emission spectrum of example 1 (10% by weight in PMMA). The emission maximum is at 462 nm. The photoluminescence quantum yield (PLQY) is 82%, the full width at half maximum is 0.46 eV and the emission lifetime is 6.8 µs. The resulting CIEx coordinate is determined at 0.16 and the CIEy coordinate at 0.20. -
- Example 2 was synthesized according to AAV1 (81% yield) and AAV7 (91% yield).
MS (HPLC-MS), m/z (retention time): 906.48 (10.15 min). -
Figure 2 depicts the emission spectrum of example 2 (10% by weight in PMMA). The emission maximum is at 475 nm. The photoluminescence quantum yield (PLQY) is 81%, the full width at half maximum is 0.46 eV and the emission lifetime is 14.8 µs. The resulting CIEx coordinate is determined at 0.18 and the CIEy coordinate at 0.27. -
- Example 3 was synthesized according to AAV1 (81% yield) and AAV7 (87% yield).
MS (HPLC-MS), m/z (retention time): 866.47 (10.72 min). -
Figure 3 depicts the emission spectrum of example 3 (10% by weight in PMMA). The emission maximum is at 469 nm. The photoluminescence quantum yield (PLQY) is 81%, the full width at half maximum is 0.46 eV and the emission lifetime is 14.8 µs. The resulting CIEx coordinate is determined at 0.18 and the CIEy coordinate at 0.27. - Example 1 was tested in an OLED-device D1 with the following layer structure:
Layer Thickness D1 9 100 nm Al 8 2 nm Liq 7 20 nm NBPhen 6 10 nm T2T 5 50 nm mCBP (80%) Example 1 (20 %) 4 10 nm mCBP 3 10 nm TCTA 2 100 nm NPB 1 130 nm ITO Substrate glass - For D1 an external quantum efficiency (EQE) at 1000 cd/m2 of 7.4 % was determined. The emission maximum is at 475 nm with a FWHM of 71 nm at 10 V. The corresponding CIEx value is 0.16 and CIEy is 0.25.
- Example 3 was tested in an OLED-device D2 with the following layer structure:
Layer Thickness D2 8 100 nm Al 7 2 nm Liq 6 30 nm NBPhen 5 50 nm mCBP (80%) Example 3 (20 %) 4 10 nm mCBP 3 10 nm TCTA 2 100 nm NPB 1 130 nm ITO Substrate glass - For D2 an external quantum efficiency (EQE) at 1000 cd/m2 of 5.5 % was determined. The emission maximum is at 476 nm with a FWHM of 70 nm at 10 V. The corresponding CIEx value is 0.17 and CIEy is 0.27.
-
-
- Figure 1
- Emission spectrum of example 1 (10% by weight) in PMMA.
- Figure 2
- Emission spectrum of example 2 (10% by weight) in PMMA.
- Figure 3
- Emission spectrum of example 3 (10% by weight) in PMMA.
EHOMO(H) > EHOMO(D) and the difference between the energy level of the highest occupied molecular orbital HOMO(E) of organic molecule according to the invention (EHOMO(E)) and the energy level of the highest occupied molecular orbital HOMO(H) of the host compound H (EHOMO(H)) is between -0.5 eV and 0.5 eV, more preferably between -0.3 eV and 0.3 eV, even more preferably between -0.2 eV and 0.2 eV or even between -0.1 eV and 0.1 eV; and ELUMO(H) > ELUMO(D) and the difference between the energy level of the lowest unoccupied molecular orbital LUMO(E) of organic molecule according to the invention (ELUMO(E)) and the lowest unoccupied molecular orbital LUMO(D) of the at least one further host compound D (ELUMO(D)) is between -0.5 eV and 0.5 eV, more preferably between -0.3 eV and 0.3 eV, even more preferably between -0.2 eV and 0.2 eV or even between -0.1 eV and 0.1 eV.
Claims (14)
- An organic molecule comprising- two second chemical moieties, each independently from another comprising a structure of Formula II,wherein the first chemical moiety is linked to each of the two second chemical moieties via a single bond;
whereinT is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is hydrogen;V is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is hydrogen;W is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is selected from the group consisting of hydrogen, CN and CF3;X is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is selected from the group consisting of hydrogen, CN and CF3;Y is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is selected from the group consisting of hydrogen, CN and CF3;# represents the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties;Z is at each occurrence independently from another selected from the group consisting of a direct bond, CR3R4, C=CR3R4, C=O, C=NR3, NR3, O, SiR3R4, S, S(O) and S(O)2;R1, R2 is independently form each other at each occurrence independently from another selected from the group consisting of
hydrogen,
deuterium,
C1-C5-alkyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium;
C2-C8-alkenyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium;
C2-C8-alkynyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium; and C6-C18-aryl,
which is optionally substituted with one or more substituents R6;Ra, R3 and R4 is at each occurrence independently from another selected from the group consisting of hydrogen,
deuterium,
N(R5)2,
OR5,
Si(R5)3,
B(OR5)2,
OSO2R5,
CF3,
CN,
F,
Br,
I,
C1-C40-alkyl,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C1-C40-alkoxy,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C1-C40-thioalkoxy,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C2-C40-alkenyl,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C2-C40-alkynyl,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C6-C60-aryl,
which is optionally substituted with one or more substituents R5; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R5;R5 is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium, N(R6)2, OR6, Si(R6)3, B(OR6)2, OSO2R6, CF3, CN, F, Br, I, C1-C40-alkyl,which is optionally substituted with one or more substituents R6 andwherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;C1-C40-alkoxy,which is optionally substituted with one or more substituents R6 andwherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;C1-C40-thioalkoxy,which is optionally substituted with one or more substituents R6 andwherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;C2-C40-alkenyl,which is optionally substituted with one or more substituents R6 andwherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;C2-C40-alkynyl,which is optionally substituted with one or more substituents R6 andwherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;C6-C60-aryl,
which is optionally substituted with one or more substituents R6; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R6;R6 is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium, OPh, CF3, CN, F,
C1-C5-alkyl,
wherein one or more hydrogen atoms are optionally, independently from each other substituted by deuterium, CN, CF3, or F;
C1-C5-alkoxy,
wherein one or more hydrogen atoms are optionally, independently from each other substituted by deuterium, CN, CF3, or F;
C1-C5-thioalkoxy,
wherein one or more hydrogen atoms are optionally, independently from each other substituted by deuterium, CN, CF3, or F;
C2-C5-alkenyl,
wherein one or more hydrogen atoms are optionally, independently from each other substituted by deuterium, CN, CF3, or F;
C2-C5-alkynyl,
wherein one or more hydrogen atoms are optionally, independently from each other substituted by deuterium, CN, CF3, or F;
C6-C18-aryl,
which is optionally substituted with one or more C1-C5-alkyl substituents;
C3-C17-heteroaryl,
which is optionally substituted with one or more C1-C5-alkyl substituents;
N(C6-C18-aryl)2;
N(C3-C17-heteroaryl)2,
and N(C3-C17-heteroaryl)(C6-C18-aryl);wherein the substituents Ra, R3, R4 or R5 independently from each other optionally form a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system with one or more substituents Ra, R3, R4 or R5;wherein exactly one substituent selected from the group consisting of W, X, and Y is CN or CF3, and exactly two substituents selected from the group consisting of T, V, W, X and Y represent the binding sites of a single bond linking the first chemical moiety and one of the two second chemical moieties. - The organic molecule according to claim 1, wherein R1 and R2 is at each occurrence independently from another selected from the group consisting of H, methyl and phenyl.
- The organic molecule according to claim 1 or 2, wherein W is CN.
- The organic molecule according to one or more of claims 1 to 4, wherein the two second chemical moieties, each at each occurrence independently from another comprise a structure of Formula IIb:Rb is at each occurrence independently from another selected from the group consisting of deuterium, N(R5)2, OR5, Si(R5)3, B(OR5)2, OSO2R5, CF3, CN, F, Br, I,
C1-C40-alkyl,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C1-C40-alkoxy,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C1-C40-thioalkoxy,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C2-C40-alkenyl,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C2-C40-alkynyl,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C6-C60-aryl,
which is optionally substituted with one or more substituents R5; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R5;and wherein apart from that the definitions in claim 1 apply. - The organic molecule according to one or more of claims 1 to 4, wherein the two second chemical moieties, each at each occurrence independently from another comprise a structure of formula IIc:Rb is at each occurrence independently from another selected from the group consisting of deuterium, N(R5)2, OR5, Si(R5)3, B(OR5)2, OSO2R5, CF3, CN, F, Br, I,
C1-C40-alkyl,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C1-C40-alkoxy,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C1-C40-thioalkoxy,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C2-C40-alkenyl,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C2-C40-alkynyl,which is optionally substituted with one or more substituents R5 andwherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;C6-C60-aryl,
which is optionally substituted with one or more substituents R5; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R5;and wherein apart from that the definitions in claim 1 apply. - The organic molecule according to claim 5 or 6, wherein Rb is at each occurrence independently from another selected from the group consisting of- Me, iPr, tBu, CN, CF3,- Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph;- pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph;- pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph;- carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph;- triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph;
and- N(Ph)2. - A process for preparing organic molecules according to claims 1 to 7, wherein a 4,6-R1-5-R2-substituted 2-chloro-3-(trifluoromethyl)benzonitrile is used as a reactant, which preferably reacts with a difluoro-substituted, cyano/(trifluoromethyl)-phenylboronic acid ester or a difluoro-substituted, cyano/(trifluoromethyl)-phenylboronic acid.
- Use of a molecule according to one or more of claims 1 to 7 as a luminescent emitter and/or as a host material and/or as an electron transport material and/or as a hole injection material and/or as a hole blocking material in an optoelectronic device.
- Use according to claim 9, wherein the optoelectronic device is selected from the group consisting of:• organic light-emitting diodes (OLEDS),• light-emitting electrochemical cells,• OLED-sensors, in particular in non-hermetically shielded gas and vapor sensors,• organic diodes,• organic solar cells,• organic transistors,• organic field-effect transistors,• organic lasers and• down-conversion elements.
- A composition comprising:(a) at least one organic molecule according to one or more of claims 1 to 7, in particular in the form of an emitter and/or a host, and(b) one or more emitter and/or host materials, which differ from the organic molecule of one or more of claims 1 to 7, and(c) optionally, one or more dyes and/or one or more solvents.
- An optoelectronic device, comprising one organic molecule according to one or more of claims 1 to 7 or a composition according to claim 11, in particular in form of a device selected from the group consisting of organic light-emitting diode (OLED), light-emitting electrochemical cell OLED-sensor, organic diode, organic solar cell, organic transistor, organic field-effect transistor, organic laser, and down-conversion element.
- The optoelectronic device according to claim 12, comprising- a substrate,- an anode, and- a cathode, wherein the anode or the cathode are disposed on the substrate, and- at least a light-emitting layer, which is arranged between the anode and the cathode and which comprises the organic molecule according to claims 1 to 7 or a composition according to claim 11.
- A process for producing an optoelectronic device, wherein an organic molecule according to one of claims 1 to 7 or a composition according to claim 11 is used, in particular comprising the processing of the organic compound by vacuum evaporation method or from a solution.
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JP2023539562A (en) * | 2020-08-21 | 2023-09-15 | 三星ディスプレイ株式會社 | Organic molecules for optoelectronic devices |
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US20140131686A1 (en) * | 2012-11-13 | 2014-05-15 | Semiconductor Energy Laboratory Co., Ltd. | Light-Emitting Element, Light-Emitting Device, Lighting Device, and Electronic Device |
EP3113239A1 (en) * | 2015-07-03 | 2017-01-04 | cynora GmbH | Organic molecules for use in organic optoelectronic devices |
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CN107739352B (en) * | 2013-03-22 | 2024-05-14 | 默克专利有限公司 | Material for electronic devices |
US10590080B2 (en) * | 2013-06-26 | 2020-03-17 | Idemitsu Kosan Co., Ltd. | Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device |
US20170244049A1 (en) * | 2014-05-14 | 2017-08-24 | President And Fellows Of Harvard College | Organic light-emitting diode materials |
KR20160030001A (en) * | 2014-09-05 | 2016-03-16 | 삼성디스플레이 주식회사 | Condensed-cyclic compound and organic light emitting device comprising the same |
KR102335767B1 (en) * | 2014-10-31 | 2021-12-08 | 삼성전자주식회사 | Carbazole-based compound and organic light emitting device including the same |
US10236450B2 (en) * | 2015-03-24 | 2019-03-19 | Massachusetts Institute Of Technology | Organic conductive materials and devices |
US11038117B2 (en) * | 2017-04-11 | 2021-06-15 | Universal Display Corporation | Organic electroluminescent materials and devices |
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US20140131686A1 (en) * | 2012-11-13 | 2014-05-15 | Semiconductor Energy Laboratory Co., Ltd. | Light-Emitting Element, Light-Emitting Device, Lighting Device, and Electronic Device |
EP3113239A1 (en) * | 2015-07-03 | 2017-01-04 | cynora GmbH | Organic molecules for use in organic optoelectronic devices |
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